Overview Review Traffic Revenue SEO
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tedu.edu.vn

tedu.edu.vn is SSL secured

Free website and domain report on tedu.edu.vn

Last Updated: 19th July, 2020 Update Now
Overview

Snoop Summary for tedu.edu.vn

This is a free and comprehensive report about tedu.edu.vn. The domain tedu.edu.vn is currently hosted on a server located in Vietnam with the IP address 103.1.236.14, where the local currency is VND and Vietnamese is the local language. Tedu.edu.vn has the potential to be earning an estimated $1 USD per day from advertising revenue. If tedu.edu.vn was to be sold it would possibly be worth $823 USD (based on the daily revenue potential of the website over a 24 month period). Tedu.edu.vn receives an estimated 391 unique visitors every day - a decent amount of traffic! This report was last updated 19th July, 2020.

About tedu.edu.vn

Site Preview: tedu.edu.vn tedu.edu.vn
Title:
Description:
Keywords and Tags: education, reference
Related Terms:
Fav Icon:
Age:
Domain Created:
Domain Updated:
Domain Expires:
Review

Snoop Score

1/5

Valuation

$823 USD
Note: All valuation figures are estimates.

Popularity

Low
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 3,014,240
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 391
Monthly Visitors: 11,901
Yearly Visitors: 142,715
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $1 USD
Monthly Revenue: $34 USD
Yearly Revenue: $407 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: tedu.edu.vn 11
Domain Name: tedu 4
Extension (TLD): eduvn 5

Page Speed Analysis

Average Load Time:
Load Time Comparison:

PageSpeed Insights

Avg. (All Categories) 69
Performance 79
Accessibility 65
Best Practices 77
SEO 82
Progressive Web App 44
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://tedu.edu.vn
Updated: 19th July, 2020

2.49 seconds
First Contentful Paint (FCP)
30%
58%
12%

0.00 seconds
First Input Delay (FID)
100%
0%
0%

Simulate loading on desktop
79

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for tedu.edu.vn. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Time to Interactive — 1.1 s
The time taken for the page to become fully interactive.
Total Blocking Time — 0 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.063
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 1.1 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 30 ms
Users could experience a delay when interacting with the page.
Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive tedu.edu.vn as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://tedu.edu.vn/
0
1237.0429998264
292
0
301
text/html
https://tedu.edu.vn/
1237.4269999564
2785.0999999791
7149
35446
200
text/html
Document
https://tedu.edu.vn/frontend/workwise/assets/css/animate.css
2803.7669998594
5645.812000148
4766
72259
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
2803.9629999548
5364.7799999453
18943
124934
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome.css
2804.1400001384
4697.8629999794
6665
33063
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome-font-awesome.min.css
2804.5020001009
4565.6619998626
6464
28099
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/font-awesome.min.css
2804.8330000602
4300.7970000617
7388
31000
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/jquery.mCustomScrollbar.min.css
2805.1550001837
5283.5030001588
4241
40733
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.css
2805.3069999442
4201.8490000628
902
1776
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick-theme.css
2805.4710002616
5655.0799999386
1199
3145
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
2805.7430000044
3620.1619999483
14427
92750
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/responsive.css
2805.9009998105
4964.8930002004
2245
7785
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/monokai-sublime.min.css
2806.0639998876
5103.4420002252
690
780
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.css
2806.1859998852
2910.1889999583
5321
36075
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.7/css/select2.min.css
2806.3870002516
2834.1890000738
2619
15180
200
text/css
Stylesheet
https://use.fontawesome.com/releases/v5.8.1/css/all.css
2806.5639999695
2827.4280000478
14265
55111
200
text/css
Stylesheet
https://connect.facebook.net/en_US/sdk.js
2811.7410000414
2826.5849999152
2682
3224
200
application/x-javascript
Script
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
2811.9049998932
5263.8779999688
22011
21737
200
image/png
Image
https://www.gravatar.com/avatar/00000000000000000000000000000000?d=mm&f=y
2812.2510001995
2845.0330002233
1829
1323
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
2812.3960001394
5701.1560001411
255327
255051
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/assets/images/com.png
2812.5390000641
5162.0970000513
1377
1105
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
2812.6389998943
4792.8840001114
48683
48408
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
2812.9719998688
6125.1489999704
57267
56992
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
2814.9149999954
5189.0310002491
57267
56992
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
2815.0059999898
5695.5550001003
57396
57121
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
2815.1050000452
5873.8620001823
38665
38390
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
2815.1910002343
5698.6569999717
47436
47161
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
2815.3599998914
5502.9700002633
155605
155329
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
2815.5780001543
5774.2369999178
116119
115843
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/xu-ly-loi-method-app-user-tostring-must-not-throw-an-exception.JPG
2815.787000116
5907.6180001721
55268
54993
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.min.js
2809.6349998377
5332.2640000843
34111
97163
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/popper.js
2809.9850001745
4102.6469999924
7080
18857
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/bootstrap.min.js
2810.3040000424
3092.8079998121
13329
51143
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
2810.6539999135
5942.2619999386
22573
92949
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.min.js
2810.783999972
5528.5140001215
10792
42863
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/scrollbar.js
2811.0179998912
4804.2770000175
483
148
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/script.js
2811.1660000868
4880.5760000832
1711
8263
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/highlight.min.js
2811.4399998449
5933.8199999183
20166
49092
200
application/javascript
Script
https://www.googletagmanager.com/gtag/js?id=UA-100363056-1
2816.4590001106
2848.4510001726
34862
86782
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.7/js/select2.min.js
2811.5309998393
2852.2459999658
18976
68388
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.all.js
2811.6430002265
2947.2920000553
17972
94358
200
application/javascript
Script
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
2835.0590001792
2854.9770000391
61995
203008
200
application/x-javascript
Script
https://www.facebook.com/tr/?id=1684668888240500&ev=fb_page_view&dl=https%3A%2F%2Ftedu.edu.vn%2F&rl=&if=false&ts=1595163019441&sw=800&sh=600
2888.3750000969
2903.7700002082
612
44
200
image/gif
Image
https://fonts.googleapis.com/css?family=Source+Sans+Pro:200,200i,300,300i,400,400i,600,600i,700,700i,900,900i
3622.4609999917
3639.1989998519
2354
32917
200
text/css
Stylesheet
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-solid-900.woff2
5699.7620002367
5715.4899998568
74751
74256
200
font/woff2
Font
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff2
5699.9460002407
5716.2089999765
75263
74768
200
font/woff2
Font
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
5701.8690002151
6063.9599999413
77524
77160
200
application/octet-stream
Font
https://tedu.edu.vn/frontend/workwise/assets/fonts/line-awesome.woff2?v=1.1.
5708.6660000496
6035.5469998904
45439
45108
200
application/octet-stream
Font
https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js
5952.7719998732
5979.8810002394
1961
2771
200
application/javascript
Script
https://www.google-analytics.com/analytics.js
6025.1009999774
6028.9329998195
19109
45958
200
text/javascript
Script
https://www.google-analytics.com/r/collect?v=1&_v=j83&a=2047904107&t=pageview&_s=1&dl=https%3A%2F%2Ftedu.edu.vn%2F&ul=en-us&de=UTF-8&dt=T%E1%BB%95ng%20h%E1%BB%A3p%20c%C3%A1c%20kh%C3%B3a%20h%E1%BB%8Dc%20online%2C%20chia%20s%E1%BA%BB%20ki%E1%BA%BFn%20th%E1%BB%A9c%20v%E1%BB%81%20c%C3%B4ng%20ngh%E1%BB%87%20th%C3%B4ng%20tin%2C%20chia%20s%E1%BA%BB%20ki%E1%BA%BFn%20th%E1%BB%A9c%20v%E1%BB%81%20hosting%20v%C3%A0%20website%2C%20H%E1%BB%8Dc%20l%E1%BA%ADp%20tr%C3%ACnh%20php%2C%20h%E1%BB%8Dc%20tin%20h%E1%BB%8Dc%20online&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=IEBAAUAB~&jid=1132792605&gjid=1275629035&cid=1910252534.1595163023&tid=UA-100363056-1&_gid=1036889030.1595163023&_r=1&gtm=2ou783&z=313973458
6052.6589998044
6059.8160000518
773
0
302
text/html
https://stats.g.doubleclick.net/r/collect?v=1&aip=1&t=dc&_r=3&tid=UA-100363056-1&cid=1910252534.1595163023&jid=1132792605&_gid=1036889030.1595163023&gjid=1275629035&_v=j83&z=313973458
6060.0279998034
6086.0899998806
799
0
302
text/html
https://www.google.com/ads/ga-audiences?v=1&aip=1&t=sr&_r=4&tid=UA-100363056-1&cid=1910252534.1595163023&jid=1132792605&_v=j83&z=313973458
6086.6209999658
6094.6149998344
689
42
200
image/gif
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
2810.986
12.454
2826.478
10.025
2837.99
7.471
2891.177
16.542
5389.412
5.246
5680.007
23.263
5703.283
59.218
5766.716
6.379
5773.474
6.31
5793.261
30.147
5824.298
6.351
5902.953
6.095
5969.21
59.733
6033.599
5.693
6040.11
8.666
6056.18
20.115
6076.309
6.702
6083.714
25.297
6109.981
5.29
6123.043
25.822
6154.174
5.528
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Tedu.edu.vn should consider lazy-loading offscreen and hidden images.
Minify CSS — Potential savings of 3 KiB
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Tedu.edu.vn should consider minifying CSS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
14427
3029
Minify JavaScript — Potential savings of 12 KiB
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Tedu.edu.vn should consider minifying JS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
22573
8900
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.all.js
17972
3151
Remove unused CSS — Potential savings of 44 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Tedu.edu.vn should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
18943
18379
https://use.fontawesome.com/releases/v5.8.1/css/all.css
14265
14084
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
14427
12453
Remove unused JavaScript — Potential savings of 41 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
61995
42381
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Tedu.edu.vn should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
(Start) http://tedu.edu.vn/
0
https://tedu.edu.vn/
190
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Tedu.edu.vn should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 1,521 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
255327
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
155605
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
116119
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
77524
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff2
75263
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-solid-900.woff2
74751
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
61995
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
57396
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
57267
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
57267
Avoids an excessive DOM size — 534 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
534
Maximum DOM Depth
SHOW DETAILS
17
Maximum Child Elements
SHOW DETAILS
18
Avoid chaining critical requests — 29 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Tedu.edu.vn should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.0 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://tedu.edu.vn/
212.146
3.136
1.341
Unattributable
66.362
1.17
0.141
Minimizes main-thread work — 0.5 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
130.358
Script Evaluation
110.906
Other
102.277
Rendering
46.26
Parse HTML & CSS
43.788
Script Parsing & Compilation
21.083
Keep request counts low and transfer sizes small — 53 requests • 1,521 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
53
1557832
Image
15
915551
Font
4
272977
Script
15
267802
Stylesheet
15
92489
Document
1
7149
Other
3
1864
Media
0
0
Third-party
18
336832
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
164279
0
SHOW DETAILS
65289
0
SHOW DETAILS
46849
0
SHOW DETAILS
34862
0
SHOW DETAILS
19882
0
SHOW DETAILS
2354
0
SHOW DETAILS
1829
0
SHOW DETAILS
799
0
SHOW DETAILS
689
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
img
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
Nguyễn Minh Hoàng 4 weeks ago [Bài Viết] Để giải quyết triệt để vấn đề đem file…
0.041540870429845
Nguyễn Minh Hoàng 1 month ago [Bài Viết] Cách chọn dữ liệu theo tháng hiện tại …
0.010559094919002
Thích Bình luận 15 31 lượt xem
0.0072443025353585
Thích Bình luận 15 30 lượt xem
0.0036536482352243
Các mẹo vặt và công cụ lập trình
2.5230888303007E-5
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 1.1 s
The time taken for the first image or text on the page to be rendered.
Largest Contentful Paint — 1.5 s
The timing of the largest text or image that is painted.

Other

First Meaningful Paint — 1.1 s
The time taken for the primary content of the page to be rendered.

Opportunities

Eliminate render-blocking resources — Potential savings of 540 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Tedu.edu.vn should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://tedu.edu.vn/frontend/workwise/assets/css/animate.css
4766
110
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
18943
310
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome.css
6665
190
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome-font-awesome.min.css
6464
190
https://tedu.edu.vn/frontend/workwise/assets/css/font-awesome.min.css
7388
190
https://tedu.edu.vn/frontend/workwise/assets/css/jquery.mCustomScrollbar.min.css
4241
150
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.css
902
70
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick-theme.css
1199
70
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
14427
150
https://tedu.edu.vn/frontend/workwise/assets/css/responsive.css
2245
70
https://tedu.edu.vn/frontend/workwise/assets/css/monokai-sublime.min.css
690
70
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.css
5321
270
https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.7/css/select2.min.css
2619
230
https://use.fontawesome.com/releases/v5.8.1/css/all.css
14265
310
Properly size images — Potential savings of 368 KiB
Images can slow down the page's load time. Tedu.edu.vn should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
255051
156261
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
57121
34970
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
56992
34891
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
56992
34891
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
48408
29652
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
38390
23523
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
21737
21108
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
47161
14629
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
155329
12802
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
115843
9677
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/xu-ly-loi-method-app-user-tostring-must-not-throw-an-exception.JPG
54993
4550
Serve images in next-gen formats — Potential savings of 594 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
255051
223879
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
155329
129757
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
115843
87321
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
48408
25742
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
57121
24971
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
56992
24836
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
56992
24836
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/xu-ly-loi-method-app-user-tostring-must-not-throw-an-exception.JPG
54993
24675
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
38390
16370
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
47161
16091
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
21737
10131

Metrics

Speed Index — 4.1 s
The time taken for the page contents to be visibly populated.

Opportunities

Reduce initial server response time — Root document took 1,550 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.

Diagnostics

Serve static assets with an efficient cache policy — 36 resources found
Tedu.edu.vn can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
0
255327
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
0
155605
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
0
116119
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
0
77524
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
0
57396
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
0
57267
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
0
57267
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/xu-ly-loi-method-app-user-tostring-must-not-throw-an-exception.JPG
0
55268
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
0
48683
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
0
47436
https://tedu.edu.vn/frontend/workwise/assets/fonts/line-awesome.woff2?v=1.1.
0
45439
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
0
38665
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.min.js
0
34111
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
0
22573
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
0
22011
https://tedu.edu.vn/frontend/workwise/assets/js/highlight.min.js
0
20166
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
0
18943
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
0
14427
https://tedu.edu.vn/frontend/workwise/assets/js/bootstrap.min.js
0
13329
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.min.js
0
10792
https://tedu.edu.vn/frontend/workwise/assets/css/font-awesome.min.css
0
7388
https://tedu.edu.vn/frontend/workwise/assets/js/popper.js
0
7080
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome.css
0
6665
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome-font-awesome.min.css
0
6464
https://tedu.edu.vn/frontend/workwise/assets/css/animate.css
0
4766
https://tedu.edu.vn/frontend/workwise/assets/css/jquery.mCustomScrollbar.min.css
0
4241
https://tedu.edu.vn/frontend/workwise/assets/css/responsive.css
0
2245
https://tedu.edu.vn/frontend/workwise/assets/js/script.js
0
1711
https://tedu.edu.vn/frontend/workwise/assets/images/com.png
0
1377
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick-theme.css
0
1199
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.css
0
902
https://tedu.edu.vn/frontend/workwise/assets/css/monokai-sublime.min.css
0
690
https://tedu.edu.vn/frontend/workwise/assets/js/scrollbar.js
0
483
https://www.gravatar.com/avatar/00000000000000000000000000000000?d=mm&f=y
300000
1829
https://connect.facebook.net/en_US/sdk.js
1200000
2682
https://www.google-analytics.com/analytics.js
7200000
19109
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-solid-900.woff2
15.72799962014
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff2
16.262999735773
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
362.09099972621
https://tedu.edu.vn/frontend/workwise/assets/fonts/line-awesome.woff2?v=1.1.
326.8809998408
65

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of tedu.edu.vn. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Contrast

Background and foreground colors have a sufficient contrast ratio
Many (if not most) users find low-contrast text difficult or impossible to read.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Names and labels

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Internationalization and localization

`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tedu.edu.vn may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Tedu.edu.vn may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

Buttons do not have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Failing Elements
button
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
img
img
img
img
Form elements do not have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Failing Elements
input
Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Internationalization and localization

`<html>` element does not have a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
Failing Elements
html

Tables and lists

Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
Failing Elements
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[Bài Viết] Dùng css tạo các link liên kết cực kỳ đẹp và chuyên nghiệp
[Bài Viết] Gán tiêu đề bài viết cùng 1 dòng để website cân đối hơn bằng css (Tr…
[Bài Viết] Các thẻ meta hỗ trợ SEO cho website của bạn được lên TOP google nhan…
[Bài Viết] Khắc phục lỗi 302 Found trong Laravel
[Bài Viết] Laravel - 301 Moved Permanently - Xử lý lỗi do bị sai đường dẫn thực…
[Bài Viết] Xử lý lỗi Method App\User::__toString() must not throw an exception

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
77

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that tedu.edu.vn should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
Bootstrap
4.0.0-beta
jQuery
1.12.4
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://tedu.edu.vn/
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 5 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
SHOW DETAILS
1
Medium
SHOW DETAILS
4
Medium
82

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for tedu.edu.vn. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of tedu.edu.vn on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Crawling and Indexing

Links are not crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Content Best Practices

Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
img
img
img
img

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
44

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of tedu.edu.vn. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of tedu.edu.vn on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://tedu.edu.vn/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 64
Performance 58
Accessibility 65
Best Practices 69
SEO 82
Progressive Web App 46
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
Simulate loading on mobile
58

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for tedu.edu.vn. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Total Blocking Time — 70 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive tedu.edu.vn as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://tedu.edu.vn/
0
525.94099985436
292
0
301
text/html
https://tedu.edu.vn/
526.27599984407
2098.3279999346
7145
35446
200
text/html
Document
https://tedu.edu.vn/frontend/workwise/assets/css/animate.css
2111.335999798
3628.8899998181
4766
72259
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
2111.496000085
2436.1979998648
18942
124934
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome.css
2111.5989997052
3880.274000112
6665
33063
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome-font-awesome.min.css
2111.777999904
4222.75599977
6464
28099
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/font-awesome.min.css
2112.0770000853
3239.2429998145
7388
31000
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/jquery.mCustomScrollbar.min.css
2112.2389999218
3960.6439997442
4241
40733
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.css
2112.4829999171
3638.4970000945
902
1776
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick-theme.css
2112.6049999148
3884.782999754
1199
3145
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
2112.7089997754
3571.6490000486
14428
92750
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/responsive.css
2113.0379997194
3890.8139998093
2245
7785
200
text/css
Stylesheet
https://tedu.edu.vn/frontend/workwise/assets/css/monokai-sublime.min.css
2113.1639997475
4390.2170001529
690
780
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.css
2113.2649998181
2142.3100000247
5329
36075
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.7/css/select2.min.css
2113.4009999223
2146.9769999385
2619
15180
200
text/css
Stylesheet
https://use.fontawesome.com/releases/v5.8.1/css/all.css
2113.6619998142
2154.6419998631
14265
55111
200
text/css
Stylesheet
https://connect.facebook.net/en_US/sdk.js
2117.470999714
2132.1310000494
2682
3224
200
application/x-javascript
Script
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
2118.7220001593
3921.8279998749
22011
21737
200
image/png
Image
https://www.gravatar.com/avatar/00000000000000000000000000000000?d=mm&f=y
2119.810000062
2151.0809999891
1829
1323
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
2119.9219999835
5524.1660000756
255327
255051
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/assets/images/com.png
2120.0109999627
4118.1910000741
1377
1105
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
2120.1669997536
4655.2149998024
48683
48408
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
2120.2659998089
4172.1850000322
57267
56992
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
2120.3620000742
4681.1449998058
57267
56992
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
2120.4800000414
4956.5030001104
57396
57121
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
2120.6000000238
4350.5059997551
38665
38390
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
2120.7229997963
4877.2829999216
47436
47161
200
image/jpeg
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
2120.8239998668
5078.1080001034
155605
155329
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
2120.941999834
4602.0430000499
116119
115843
200
image/png
Image
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/xu-ly-loi-method-app-user-tostring-must-not-throw-an-exception.JPG
2121.6529998928
4074.0939998068
521
318
403
text/html
Image
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.min.js
2115.5769997276
4333.0560000613
34111
97163
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/popper.js
2115.7510001212
3445.9560001269
7080
18857
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/bootstrap.min.js
2115.8819999546
4092.3870000988
13330
51143
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
2116.0329999402
4454.6369998716
22573
92949
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.min.js
2116.5629997849
4010.4819997214
10792
42863
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/scrollbar.js
2116.6739999317
4268.5579997487
483
148
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/script.js
2116.833999753
3834.7769998945
1711
8263
200
application/javascript
Script
https://tedu.edu.vn/frontend/workwise/assets/js/highlight.min.js
2116.9569999911
4040.8779997379
20166
49092
200
application/javascript
Script
https://www.googletagmanager.com/gtag/js?id=UA-100363056-1
2121.7660000548
2155.9600001201
34862
86782
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.7/js/select2.min.js
2117.0429997146
2155.394999776
18976
68388
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.all.js
2117.1809998341
2153.3610001206
17980
94358
200
application/javascript
Script
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
2135.4859997518
2153.9809997194
61995
203008
200
application/x-javascript
Script
https://www.facebook.com/tr/?id=1684668888240500&ev=fb_page_view&dl=https%3A%2F%2Ftedu.edu.vn%2F&rl=&if=false&ts=1595163042060&sw=360&sh=640
2184.5149998553
2200.1279997639
612
44
200
image/gif
Image
https://fonts.googleapis.com/css?family=Source+Sans+Pro:200,200i,300,300i,400,400i,600,600i,700,700i,900,900i
3573.7859997898
3591.2669999525
2303
32917
200
text/css
Stylesheet
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-solid-900.woff2
4434.8169998266
4451.1489998549
74751
74256
200
font/woff2
Font
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff2
4435.0080001168
4450.4740000702
75263
74768
200
font/woff2
Font
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
4436.5220000036
5229.708999861
77524
77160
200
application/octet-stream
Font
https://tedu.edu.vn/frontend/workwise/assets/fonts/line-awesome.woff2?v=1.1.
4442.9279998876
4728.0279998668
45439
45108
200
application/octet-stream
Font
https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js
4517.8680000827
4548.9449999295
1961
2771
200
application/javascript
Script
https://www.google-analytics.com/analytics.js
4597.1800000407
4601.2499998324
19110
45958
200
text/javascript
Script
https://www.google-analytics.com/r/collect?v=1&_v=j83&a=761379912&t=pageview&_s=1&dl=https%3A%2F%2Ftedu.edu.vn%2F&ul=en-us&de=UTF-8&dt=T%E1%BB%95ng%20h%E1%BB%A3p%20c%C3%A1c%20kh%C3%B3a%20h%E1%BB%8Dc%20online%2C%20chia%20s%E1%BA%BB%20ki%E1%BA%BFn%20th%E1%BB%A9c%20v%E1%BB%81%20c%C3%B4ng%20ngh%E1%BB%87%20th%C3%B4ng%20tin%2C%20chia%20s%E1%BA%BB%20ki%E1%BA%BFn%20th%E1%BB%A9c%20v%E1%BB%81%20hosting%20v%C3%A0%20website%2C%20H%E1%BB%8Dc%20l%E1%BA%ADp%20tr%C3%ACnh%20php%2C%20h%E1%BB%8Dc%20tin%20h%E1%BB%8Dc%20online&sd=24-bit&sr=360x640&vp=360x640&je=0&_u=IEBAAUAB~&jid=1152423278&gjid=1413445243&cid=1425535069.1595163044&tid=UA-100363056-1&_gid=1516717734.1595163044&_r=1&gtm=2ou783&z=1243844494
4623.8839998841
4633.5889999755
789
0
302
text/html
https://stats.g.doubleclick.net/r/collect?v=1&aip=1&t=dc&_r=3&tid=UA-100363056-1&cid=1425535069.1595163044&jid=1152423278&_gid=1516717734.1595163044&gjid=1413445243&_v=j83&z=1243844494
4633.8189998642
4638.0179999396
800
0
302
text/html
https://www.google.com/ads/ga-audiences?v=1&aip=1&t=sr&_r=4&tid=UA-100363056-1&cid=1425535069.1595163044&jid=1152423278&_v=j83&z=1243844494
4638.1970001385
4646.1529997177
689
42
200
image/gif
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
2123.549
7.368
2133.628
7.532
2189.373
14.605
4414.328
23.696
4438.043
57.632
4498.414
5.299
4503.726
22.781
4526.518
5.46
4532.464
69.395
4602.191
5.105
4612.976
7.15
4627.624
19.329
4758.749
22.476
5258.648
21.923
5548.349
5.25
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Tedu.edu.vn should consider lazy-loading offscreen and hidden images.
Minify JavaScript — Potential savings of 12 KiB
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Tedu.edu.vn should consider minifying JS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
22573
8900
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.all.js
17980
3152
Remove unused JavaScript — Potential savings of 41 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
61995
42416
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Tedu.edu.vn should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
(Start) http://tedu.edu.vn/
0
https://tedu.edu.vn/
630
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Tedu.edu.vn should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 1,468 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
255327
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
155605
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
116119
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
77524
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff2
75263
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-solid-900.woff2
74751
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
61995
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
57396
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
57267
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
57267
Avoids an excessive DOM size — 534 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
534
Maximum DOM Depth
SHOW DETAILS
17
Maximum Child Elements
SHOW DETAILS
18
Avoid chaining critical requests — 29 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Tedu.edu.vn should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.4 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://tedu.edu.vn/
744.752
11.068
4.292
Unattributable
236.804
3.66
0.616
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.min.js
178.108
80.476
6.264
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
98.828
75.184
16.916
https://www.google-analytics.com/analytics.js
77.976
68.568
5.564
https://tedu.edu.vn/frontend/workwise/assets/js/highlight.min.js
59.172
56.088
3.084
https://www.googletagmanager.com/gtag/js?id=UA-100363056-1
53.152
42.448
7.76
Minimizes main-thread work — 1.7 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
524.78
Script Evaluation
413.94
Other
354.828
Rendering
171.312
Parse HTML & CSS
137.52
Script Parsing & Compilation
81.212
Keep request counts low and transfer sizes small — 53 requests • 1,468 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
53
1503065
Image
15
860804
Font
4
272977
Script
15
267812
Stylesheet
15
92446
Document
1
7145
Other
3
1881
Media
0
0
Third-party
18
336815
Minimize third-party usage — Third-party code blocked the main thread for 20 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
SHOW DETAILS
19899
15.62
SHOW DETAILS
164279
0
SHOW DETAILS
65289
0
SHOW DETAILS
46865
0
SHOW DETAILS
34862
0
SHOW DETAILS
2303
0
SHOW DETAILS
1829
0
SHOW DETAILS
800
0
SHOW DETAILS
689
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
[Bài Viết] Clearing some Caches in Laravel
Avoid large layout shifts
Below is a list of all DOM elements that contribute to the CLS of the page.
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 4 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
7080
139
https://tedu.edu.vn/
1140
115
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.min.js
5880
95
https://connect.facebook.net/en_US/sdk.js?hash=33cd9e00923162cfa8fc75041391f014&ua=modern_es6
3720
58

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 3.7 s
The time taken for the first image or text on the page to be rendered.
Time to Interactive — 6.5 s
The time taken for the page to become fully interactive.

Other

First CPU Idle — 5.7 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 140 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 3.7 s
The time taken for the primary content of the page to be rendered.

Opportunities

Properly size images — Potential savings of 70 KiB
Images can slow down the page's load time. Tedu.edu.vn should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
255051
27284
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
21737
17401
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
57121
6018
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
56992
6004
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
56992
6004
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
48408
5266
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
38390
4117
Minify CSS — Potential savings of 3 KiB
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Tedu.edu.vn should consider minifying CSS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
14428
3029
Remove unused CSS — Potential savings of 44 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Tedu.edu.vn should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
18942
18421
https://use.fontawesome.com/releases/v5.8.1/css/all.css
14265
14075
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
14428
12436

Metrics

Speed Index — 9.1 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 4.5 s
The timing of the largest text or image that is painted.

Opportunities

Eliminate render-blocking resources — Potential savings of 1,410 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Tedu.edu.vn should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://tedu.edu.vn/frontend/workwise/assets/css/animate.css
4766
480
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
18942
1380
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome.css
6665
780
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome-font-awesome.min.css
6464
780
https://tedu.edu.vn/frontend/workwise/assets/css/font-awesome.min.css
7388
930
https://tedu.edu.vn/frontend/workwise/assets/css/jquery.mCustomScrollbar.min.css
4241
630
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.css
902
180
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick-theme.css
1199
180
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
14428
630
https://tedu.edu.vn/frontend/workwise/assets/css/responsive.css
2245
180
https://tedu.edu.vn/frontend/workwise/assets/css/monokai-sublime.min.css
690
180
https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/7.0.2/sweetalert2.css
5329
1080
https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.7/css/select2.min.css
2619
930
https://use.fontawesome.com/releases/v5.8.1/css/all.css
14265
1380
Serve images in next-gen formats — Potential savings of 570 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
255051
223879
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
155329
129757
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
115843
87321
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
48408
25742
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
57121
24971
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
56992
24836
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
56992
24836
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
38390
16370
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
47161
16091
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
21737
10131
Reduce initial server response time — Root document took 1,570 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.

Diagnostics

Serve static assets with an efficient cache policy — 35 resources found
Tedu.edu.vn can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/clearing-some-caches-in-laravel.png
0
255327
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/khac-phuc-loi-302-found-trong-laravel.png
0
155605
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/laravel-301-moved-permanently-xu-ly-loi-do-bi-sai-duong-dan-thuc-thi-.png
0
116119
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
0
77524
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/dung-css-tao-cac-link-lien-ket-cuc-ky-dep-va-chuyen-nghiep.JPG
0
57396
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-chon-du-lieu-theo-thang-hien-tai-get-current-month-data-in-the-user-model-.jpg
0
57267
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cach-tinh-chinh-trang-hien-thi-loi-danh-cho-laravel-6-9.jpg
0
57267
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/de-giai-quyet-triet-de-van-de-dem-file-index-ra-ben-ngoai-loi-bao-mat-trong-lap-trinh-laravel-.JPG
0
48683
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/cac-the-meta-ho-tro-seo-cho-website-cua-ban-duoc-len-top-google-nhanh-chong.JPG
0
47436
https://tedu.edu.vn/frontend/workwise/assets/fonts/line-awesome.woff2?v=1.1.
0
45439
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/gan-tieu-de-bai-viet-cung-1-dong-de-website-can-doi-hon-bang-css.JPG
0
38665
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.min.js
0
34111
https://tedu.edu.vn/frontend/workwise/assets/js/jquery.mCustomScrollbar.js
0
22573
https://tedu.edu.vn/frontend/workwise/upload/images/logo.png
0
22011
https://tedu.edu.vn/frontend/workwise/assets/js/highlight.min.js
0
20166
https://tedu.edu.vn/frontend/workwise/assets/css/bootstrap.min.css
0
18942
https://tedu.edu.vn/frontend/workwise/assets/css/style.css
0
14428
https://tedu.edu.vn/frontend/workwise/assets/js/bootstrap.min.js
0
13330
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.min.js
0
10792
https://tedu.edu.vn/frontend/workwise/assets/css/font-awesome.min.css
0
7388
https://tedu.edu.vn/frontend/workwise/assets/js/popper.js
0
7080
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome.css
0
6665
https://tedu.edu.vn/frontend/workwise/assets/css/line-awesome-font-awesome.min.css
0
6464
https://tedu.edu.vn/frontend/workwise/assets/css/animate.css
0
4766
https://tedu.edu.vn/frontend/workwise/assets/css/jquery.mCustomScrollbar.min.css
0
4241
https://tedu.edu.vn/frontend/workwise/assets/css/responsive.css
0
2245
https://tedu.edu.vn/frontend/workwise/assets/js/script.js
0
1711
https://tedu.edu.vn/frontend/workwise/assets/images/com.png
0
1377
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick-theme.css
0
1199
https://tedu.edu.vn/frontend/workwise/assets/lib/slick/slick.css
0
902
https://tedu.edu.vn/frontend/workwise/assets/css/monokai-sublime.min.css
0
690
https://tedu.edu.vn/frontend/workwise/assets/js/scrollbar.js
0
483
https://www.gravatar.com/avatar/00000000000000000000000000000000?d=mm&f=y
300000
1829
https://connect.facebook.net/en_US/sdk.js
1200000
2682
https://www.google-analytics.com/analytics.js
7200000
19110
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-solid-900.woff2
16.332000028342
https://use.fontawesome.com/releases/v5.8.1/webfonts/fa-brands-400.woff2
15.465999953449
https://tedu.edu.vn/frontend/workwise/assets/fonts/fontawesome-webfont.woff2?v=4.7.0
793.18699985743
https://tedu.edu.vn/frontend/workwise/assets/fonts/line-awesome.woff2?v=1.1.
285.09999997914

Other

First Contentful Paint (3G) — 7635 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.
65

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of tedu.edu.vn. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Contrast

Background and foreground colors have a sufficient contrast ratio
Many (if not most) users find low-contrast text difficult or impossible to read.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Names and labels

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Internationalization and localization

`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tedu.edu.vn may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Tedu.edu.vn may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

Buttons do not have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Failing Elements
button
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
img
img
img
img
Form elements do not have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Failing Elements
input
Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Internationalization and localization

`<html>` element does not have a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
Failing Elements
html

Tables and lists

Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
Failing Elements
[Bài Viết] Clearing some Caches in Laravel
[Bài Viết] Để giải quyết triệt để vấn đề đem file index ra bên ngoài (Lỗi bảo m…
[Bài Viết] Cách chọn dữ liệu theo tháng hiện tại (Get Current Month data in the…
[Bài Viết] Cách tinh chỉnh trang hiển thị lổi dành cho laravel 6.9
[Bài Viết] Dùng css tạo các link liên kết cực kỳ đẹp và chuyên nghiệp
[Bài Viết] Gán tiêu đề bài viết cùng 1 dòng để website cân đối hơn bằng css (Tr…
[Bài Viết] Các thẻ meta hỗ trợ SEO cho website của bạn được lên TOP google nhan…
[Bài Viết] Khắc phục lỗi 302 Found trong Laravel
[Bài Viết] Laravel - 301 Moved Permanently - Xử lý lỗi do bị sai đường dẫn thực…
[Bài Viết] Xử lý lỗi Method App\User::__toString() must not throw an exception

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
69

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that tedu.edu.vn should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
Bootstrap
4.0.0-beta
jQuery
1.12.4
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://tedu.edu.vn/
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 5 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
SHOW DETAILS
1
Medium
SHOW DETAILS
4
Medium

Audits

Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
URL Description
https://tedu.edu.vn/frontend/workwise/upload/images/tintuc/xu-ly-loi-method-app-user-tostring-must-not-throw-an-exception.JPG
Failed to load resource: the server responded with a status of 403 (Forbidden)
82

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for tedu.edu.vn. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of tedu.edu.vn on mobile screens.
Document uses legible font sizes — 100% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
SHOW DETAILS
100.00%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Tap targets are not sized appropriately — 71% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.
Tap Target Size Overlapping Target
Clearing some Caches in Laravel
171x17
[Bài Viết]
Khắc phục lỗi 302 Found trong Laravel
154x17
[Bài Viết]
[Bài Viết]
81x24
Để giải quyết triệt để vấn đề đem file index ra bên ngoài (Lỗi bảo mật trong Lậ…
[Bài Viết]
81x24
Cách chọn dữ liệu theo tháng hiện tại (Get Current Month data in the User model…
[Bài Viết]
81x24
Cách tinh chỉnh trang hiển thị lổi dành cho laravel 6.9
[Bài Viết]
81x24
Dùng css tạo các link liên kết cực kỳ đẹp và chuyên nghiệp
[Bài Viết]
81x24
Gán tiêu đề bài viết cùng 1 dòng để website cân đối hơn bằng css (Truncate css)
[Bài Viết]
81x24
Các thẻ meta hỗ trợ SEO cho website của bạn được lên TOP google nhanh chóng
[Bài Viết]
81x24
Laravel - 301 Moved Permanently - Xử lý lỗi do bị sai đường dẫn thực thi.
[Bài Viết]
81x24
Xử lý lỗi Method App\User::__toString() must not throw an exception
Bình luận 15
93x14
31 lượt xem
Bình luận 15
93x14
30 lượt xem
Bình luận 15
93x14
43 lượt xem
Bình luận 15
93x14
73 lượt xem
Bình luận 15
93x14
62 lượt xem
Bình luận 15
93x14
143 lượt xem
Bình luận 15
93x14
70 lượt xem
Bình luận 15
93x14
16,772 lượt xem
Bình luận 15
93x14
261 lượt xem
Bình luận 15
93x14
140 lượt xem
Php
46x16
Laravel
Json
49x16
Laravel
Json
49x16
HTML + Javascript + CSS
HTML + Javascript + CSS
176x16
Các mẹo vặt và công cụ lập trình
Các mẹo vặt và công cụ lập trình
226x16
Các lỗi khó chịu trong lập trình
Các lỗi khó chịu trong lập trình
209x16
Quản lý cơ sở dữ liệu
Tải miễn phí
94x16
Quản lý cơ sở dữ liệu

Crawling and Indexing

Links are not crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Content Best Practices

Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
img
img
img
img
img
img
img
img
img

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
46

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of tedu.edu.vn. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of tedu.edu.vn on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://tedu.edu.vn/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 103.1.236.14
Continent: Asia
Country: Vietnam
Vietnam Flag
Region:
City:
Longitude: 105.9999
Latitude: 16.0023
Currencies: VND
Languages: Vietnamese

Web Hosting Provider

Name IP Address
Super Online Data Co., Ltd
Registration

Domain Registrant

Private Registration: No
Name:
Organization:
Country:
City:
State:
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Unknown
WOT Rating:
WOT Trustworthiness:
WOT Child Safety:
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: esu.vn
Issued By: Let's Encrypt Authority X3
Valid From: 28th June, 2020
Valid To: 26th September, 2020
Subject: CN = esu.vn
Hash: 23bfcd97
Issuer: CN = Let's Encrypt Authority X3
O = Let's Encrypt
S = US
Version: 2
Serial Number: 0x03D14CBD41EB8192E728133B5218D1087C22
Serial Number (Hex): 03D14CBD41EB8192E728133B5218D1087C22
Valid From: 28th June, 2024
Valid To: 26th September, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
Certificate Policies: Policy: 2.23.140.1.2.1
Policy: 1.3.6.1.4.1.44947.1.1.1
CPS: http://cps.letsencrypt.org
Authority Information Access: OCSP - URI:http://ocsp.int-x3.letsencrypt.org
CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 5E:A7:73:F9:DF:56:C0:E7:B5:36:48:7D:D0:49:E0:32:
7A:91:9A:0C:84:A1:12:12:84:18:75:96:81:71:45:58
Timestamp : Jun 28 04:20:50.604 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:2C:C4:8F:EB:2B:C7:13:F9:BE:8B:9C:F0:
71:D1:60:00:0A:99:9F:C3:09:01:67:E3:FA:A1:05:CB:
8A:A0:CE:F0:02:21:00:D3:22:F8:6D:3F:24:04:E7:50:
04:A6:A8:21:CF:CF:EC:3D:E5:68:3F:F0:D9:75:2A:0E:
C9:38:16:AC:DA:85:71
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : B2:1E:05:CC:8B:A2:CD:8A:20:4E:87:66:F9:2B:B9:8A:
25:20:67:6B:DA:FA:70:E7:B2:49:53:2D:EF:8B:90:5E
Timestamp : Jun 28 04:20:50.637 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:8D:C1:48:6F:33:57:F0:87:4F:8B:35:
13:C2:CA:59:4E:A0:C9:07:57:9C:1D:6A:05:AC:0F:4C:
7F:EB:1F:DF:3D:02:21:00:C9:2F:B8:06:08:8A:5A:9A:
14:9C:07:5C:9A:C7:24:E9:47:D0:D4:3B:CC:9D:77:F7:
15:30:3C:4C:E3:56:D6:64
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:gowhere.vn
DNS:gowherevn.com
DNS:tedu.edu.vn
DNS:trungtambuonban.com
DNS:vnedu-connect.vnpttiengiang.vn
DNS:www.esu.vn
DNS:www.gowhere.vn
DNS:www.tedu.edu.vn
DNS:esu.vn
Technical

DNS Lookup

A Records

Host IP Address Class TTL
tedu.edu.vn. 103.1.236.14 IN 3599

NS Records

Host Nameserver Class TTL
tedu.edu.vn. hcm-server1.vnn.vn. IN 3599
tedu.edu.vn. vdc-hn01.vnn.vn. IN 3599

MX Records

Priority Host Server Class TTL
10 tedu.edu.vn. ALT4.ASPMX.L.GOOGLE.COM. IN 3599
5 tedu.edu.vn. ALT2.ASPMX.L.GOOGLE.COM. IN 3599
5 tedu.edu.vn. ALT1.ASPMX.L.GOOGLE.COM. IN 3599
10 tedu.edu.vn. ALT3.ASPMX.L.GOOGLE.COM. IN 3599
1 tedu.edu.vn. ASPMX.L.GOOGLE.COM. IN 3599

SOA Records

Domain Name Primary NS Responsible Email TTL
tedu.edu.vn. vdc-hn01.vnn.vn. postmaster.vnn.vn. 3599

HTTP Response Headers

Whois Lookup

Created:
Changed:
Expires:
Status:
Nameservers:
Full Whois: tedu.edu.vn domain is not supported
View Raw Whois

Nameservers

Related

Subdomains

Similar Sites

Organic Search (US) Competitors

Backlink Competitors

Sites with the same domain name

Domain Valuation Snoop Score
tedu.com.vn
$4,550 USD 2/5
tedu.edu.tr
0/5
tedu.ir
$776 USD 1/5
tedu.online
0/5

Sites hosted on the same IP address

Domain Valuation Snoop Score
esu.vn
$511 USD 1/5
gowhere.vn
$738 USD 1/5
khonggianchauau.net
0/5
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