8.7 sec in total
1.3 sec
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563 ms
Welcome to ndf.violet.vn homepage info - get ready to check Ndf Violet best content for Vietnam right away, or after learning these important things about ndf.violet.vn
Mạng xã hội của cộng đồng giáo viên Việt Nam, nơi giao lưu kiến thức và chia sẻ tài nguyên dạy học
Visit ndf.violet.vnWe analyzed Ndf.violet.vn page load time and found that the first response time was 1.3 sec and then it took 7.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
ndf.violet.vn performance score
name
value
score
weighting
Value4.9 s
10/100
10%
Value13.2 s
0/100
25%
Value9.3 s
12/100
10%
Value120 ms
97/100
30%
Value0.009
100/100
15%
Value7.9 s
44/100
10%
1303 ms
725 ms
1474 ms
50 ms
743 ms
Our browser made a total of 110 requests to load all elements on the main page. We found that 18% of them (20 requests) were addressed to the original Ndf.violet.vn, 35% (39 requests) were made to D2.violet.vn and 21% (23 requests) were made to D3.violet.vn. The less responsive or slowest element that took the longest time to load (3.5 sec) relates to the external source D2.violet.vn.
Page size can be reduced by 403.9 kB (38%)
1.1 MB
646.6 kB
In fact, the total size of Ndf.violet.vn main page is 1.1 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 592.5 kB which makes up the majority of the site volume.
Potential reduce by 134.1 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 134.1 kB or 91% of the original size.
Potential reduce by 49.9 kB
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. Ndf Violet images are well optimized though.
Potential reduce by 202.3 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 202.3 kB or 70% of the original size.
Potential reduce by 17.7 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. Ndf.violet.vn needs all CSS files to be minified and compressed as it can save up to 17.7 kB or 76% of the original size.
Number of requests can be reduced by 24 (22%)
108
84
The browser has sent 108 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ndf Violet. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.
ndf.violet.vn
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ndf.violet.vn accessibility score
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
List items (<li>) are not contained within <ul> or <ol> parent elements.
ndf.violet.vn 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
Detected JavaScript libraries
Browser errors were logged to the console
Issues were logged in the Issues panel in Chrome Devtools
ndf.violet.vn SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
VI
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ndf.violet.vn can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese is used on the page, and it does not match the claimed English language. Our system also found out that Ndf.violet.vn main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
ndf.violet.vn
Open Graph description is not detected on the main page of Ndf Violet. 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: