6 sec in total
2.8 sec
3 sec
177 ms
Click here to check amazing W 3 Cschool content for China. Otherwise, check out these important facts you probably never knew about w3cschool.cn
w3cschool启用中文品牌名--编程狮,是一个专业的W3C前端开发及编程入门学习平台,提供包括HTML,CSS,Javascript,jQuery,C,PHP,Java,Python,Sql,Mysql等编程语言和开源技术的在线教程及使用手册,是类国外w3schools的W3C学习社区及菜鸟编程平台。
Visit w3cschool.cnWe analyzed W3cschool.cn page load time and found that the first response time was 2.8 sec and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
w3cschool.cn performance score
name
value
score
weighting
Value5.8 s
5/100
10%
Value11.8 s
0/100
25%
Value11.6 s
5/100
10%
Value760 ms
39/100
30%
Value0
100/100
15%
Value9.2 s
33/100
10%
2777 ms
67 ms
137 ms
137 ms
132 ms
Our browser made a total of 9 requests to load all elements on the main page. We found that all of those requests were addressed to W3cschool.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain W3cschool.cn.
Page size can be reduced by 22.2 kB (50%)
44.2 kB
22.0 kB
In fact, the total size of W3cschool.cn main page is 44.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. CSS take 16.2 kB which makes up the majority of the site volume.
Potential reduce by 8.6 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 8.6 kB or 70% of the original size.
Potential reduce by 0 B
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. W 3 Cschool images are well optimized though.
Potential reduce by 13.6 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. W3cschool.cn needs all CSS files to be minified and compressed as it can save up to 13.6 kB or 84% of the original size.
We found no issues to fix!
8
8
The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of W 3 Cschool. According to our analytics all requests are already optimized.
w3cschool.cn
2777 ms
c3.css
67 ms
site_photoref.jpg
137 ms
site_photoexa.jpg
137 ms
site_photoqe.jpg
132 ms
site_holder.gif
67 ms
site_wrapper.gif
120 ms
site_head_index.gif
120 ms
site_nav.gif
121 ms
w3cschool.cn accessibility score
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
w3cschool.cn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Registers an unload listener
Detected JavaScript libraries
Issues were logged in the Issues panel in Chrome Devtools
w3cschool.cn SEO score
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
ZH
ZH
GB2312
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise W3cschool.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it matches the claimed language. Our system also found out that W3cschool.cn main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
w3cschool.cn
Open Graph description is not detected on the main page of W 3 Cschool. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: