33.7 sec in total
1.1 sec
31.4 sec
1.2 sec
Welcome to vanlang.vn homepage info - get ready to check Van Lang best content for Vietnam right away, or after learning these important things about vanlang.vn
Nhà sách trực tuyến online.vanlang.vn cung cấp sách, lịch, văn phòng phẩm, giao hàng toàn quốc. Gọi 028.38.233.022 (108) để được phục vụ. Nhà sách online, mua sách online.
Visit vanlang.vnWe analyzed Vanlang.vn page load time and found that the first response time was 1.1 sec and then it took 32.6 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 18 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
vanlang.vn performance score
name
value
score
weighting
Value3.8 s
27/100
10%
Value11.7 s
0/100
25%
Value11.8 s
4/100
10%
Value840 ms
34/100
30%
Value0.012
100/100
15%
Value11.6 s
18/100
10%
1118 ms
315 ms
665 ms
655 ms
962 ms
Our browser made a total of 73 requests to load all elements on the main page. We found that 93% of them (68 requests) were addressed to the original Vanlang.vn, 3% (2 requests) were made to Images.dmca.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (20.1 sec) belongs to the original domain Vanlang.vn.
Page size can be reduced by 438.7 kB (5%)
9.3 MB
8.8 MB
In fact, the total size of Vanlang.vn main page is 9.3 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. 35% of websites need less resources to load. Images take 9.0 MB which makes up the majority of the site volume.
Potential reduce by 58.0 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. This page needs HTML code to be minified as it can gain 9.2 kB, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 58.0 kB or 81% of the original size.
Potential reduce by 229.8 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. Van Lang images are well optimized though.
Potential reduce by 141.9 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 141.9 kB or 66% of the original size.
Potential reduce by 8.9 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. Vanlang.vn needs all CSS files to be minified and compressed as it can save up to 8.9 kB or 75% of the original size.
Number of requests can be reduced by 13 (25%)
52
39
The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Van Lang. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.
vanlang.vn
1118 ms
base.css
315 ms
style.css
665 ms
tab.css
655 ms
jquery-1.9.1.min.js
962 ms
jssor.slider.mini.js
982 ms
main.js
665 ms
DMCABadgeHelper.min.js
172 ms
jquery.windy.js
656 ms
analytics.js
66 ms
_dmca_premi_badge_3.png
59 ms
icon-phone.png
321 ms
logo.png
3080 ms
icon-register.png
1235 ms
7d672663e7d786555df356322d7f57e9.jpg
17136 ms
bef34ba5ce067c8a584fdbe4020a24c5.jpg
19610 ms
af17aeb86aab38b45145999bbf552217.jpg
5902 ms
5b8a8dffe6755e0cb16fc70136b298f0.jpg
8186 ms
560299eba89b101133f0e65f8886dd42.jpg
3772 ms
d4bf80f2c9ac5006dc086552717a82b1.jpg
14594 ms
d14195b8105729c771679b239396c80a.jpg
14938 ms
lamgiauquachungkhoanvl.jpg
6533 ms
8c8e7ad41806792efc63be1f38a52239.jpg
6915 ms
353430892018db5993115a235d24415a.jpg
7218 ms
6976c23ab047a633262f8d37bd1d42f0.jpg
10103 ms
19f3bf34836e8a2374a34b4327283fb7.jpg
9386 ms
lichsutrungdong14.jpg
19842 ms
quatrinhchuyenbienaskja.jpg
12772 ms
33fb5032eb95c032827d99631111da3f.png
16868 ms
tamlyhocvsadoisong.jpg
15940 ms
3772ad133b8cbba4c9304c622207d08a.png
17188 ms
4c656fc50b29c2c91a43d88ee7023bff.png
18522 ms
ae11d883a011fbcd1c51b5e9fae21a50.png
18520 ms
e03b389213e7a7ba6470084254288def.png
18407 ms
7eca4318f34e7fa5da24813765a8644a.png
18519 ms
0932bc0d84798e13828ae16ad86a4083.png
19618 ms
0db113bf7879ef567854f9ba1b7a2b04.jpg
18827 ms
0cfcac709cc2c21731cdefd611072983.jpg
19838 ms
c800dab92267e3e21d0773e69ecedc69.png
19838 ms
7fcd54a857eed35166122f8d665e6af4.png
19838 ms
49e29403da28715ccc62bc3e80b00124.jpg
19838 ms
ngonngucothe.jpg
19839 ms
thuat-phat-hien-lua-doi.jpg
19838 ms
fefa0e649eab4aed60ce5e51ae8c3aea.jpg
19839 ms
57d3cb19e34379f5bb59c62ebbae3274.jpg
19845 ms
5b3ceaef4955dd1f0d6559a34d251379.jpg
19844 ms
fa3d33ec9ad2e1cf573b8f3832e35ba2.jpg
19799 ms
collect
44 ms
collect
274 ms
e5c6da40bdb9e766e578377064d829f5.jpg
19537 ms
91bc9acef53cd19d2aa9a70df65fb2d3.jpg
19594 ms
c880396fbebd7385e7457facd3ad2b96.jpg
19751 ms
359b6619f2fc4e0700c9aff6ef87f5b3.jpg
20057 ms
93087ce2d76c552a13520391ac8c3b62.jpg
19926 ms
3d62243359b7bae708fb951b8f1e6e73.jpg
19879 ms
8dfc099ca64733b195f622432038511a.jpg
19912 ms
f0c8196339536e9f1ceeea249ad8a719.jpg
17776 ms
bf375c495083aa478b0177d3a6b84f6a.jpg
19643 ms
cb381dffa023d352d630d3472279ffa7.jpg
18032 ms
74a5acc5e22112dfd7ab5f78e7784aba.jpg
17272 ms
dbb26c02464dca2986db0dcda31934e8.jpg
16512 ms
dang-ky-bo-cong-thuong.png
12098 ms
vhide.png
12530 ms
vhotline.png
11490 ms
icon-cart.png
10787 ms
search.png
10600 ms
icon-danhmuc.png
10558 ms
star.png
9369 ms
user.png
9435 ms
a03.png
9511 ms
bg-menu-danhmuc.png
9522 ms
icon-active.png
9247 ms
top.png
8624 ms
vanlang.vn accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
[role]s are not contained by their required parent element
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
Buttons do not have an accessible name
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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.
vanlang.vn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
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
Page has valid source maps
vanlang.vn SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
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
Tap targets are not sized appropriately
VI
VN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vanlang.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 language. Our system also found out that Vanlang.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.
vanlang.vn
Open Graph description is not detected on the main page of Van Lang. 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: