1.5 sec in total
135 ms
1.2 sec
179 ms
Welcome to support.vitalsource.com homepage info - get ready to check Support Vital Source best content for United States right away, or after learning these important things about support.vitalsource.com
Visit support.vitalsource.comWe analyzed Support.vitalsource.com page load time and found that the first response time was 135 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
support.vitalsource.com performance score
name
value
score
weighting
Value3.8 s
28/100
10%
Value6.7 s
7/100
25%
Value5.3 s
58/100
10%
Value1,650 ms
11/100
30%
Value0
100/100
15%
Value11.7 s
17/100
10%
135 ms
133 ms
257 ms
171 ms
182 ms
Our browser made a total of 33 requests to load all elements on the main page. We found that 9% of them (3 requests) were addressed to the original Support.vitalsource.com, 33% (11 requests) were made to P6.zdassets.com and 21% (7 requests) were made to P1.zdassets.com. The less responsive or slowest element that took the longest time to load (321 ms) relates to the external source P1.zdassets.com.
Page size can be reduced by 592.7 kB (70%)
852.6 kB
259.9 kB
In fact, the total size of Support.vitalsource.com main page is 852.6 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. 35% of websites need less resources to load. Javascripts take 759.0 kB which makes up the majority of the site volume.
Potential reduce by 33.6 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 33.6 kB or 77% of the original size.
Potential reduce by 523.4 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 523.4 kB or 69% of the original size.
Potential reduce by 35.7 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. Support.vitalsource.com needs all CSS files to be minified and compressed as it can save up to 35.7 kB or 72% of the original size.
Number of requests can be reduced by 11 (46%)
24
13
The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Support Vital Source. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
support.vitalsource.com
135 ms
hc
133 ms
en-us
257 ms
application-80c7aad11baf60732a806f5ba7f66d94.css
171 ms
style-3503ce311b7bf854bc218012718aa92b.css
182 ms
jquery-ded366808f7e9b8657865f599dda349a.js
204 ms
run_prettify.js
141 ms
script-3503ce311b7bf854bc218012718aa92b.js
178 ms
locales-788da2df07ddd213a5a788c0404eb5a44a0e1310.js
186 ms
host.js
222 ms
vendor_enduser-2ece5393630b699856d9e895b8a3cc1e.js
289 ms
hc_enduser-6660d6d5f4f0af43fab9579ac73991e6.js
289 ms
helpcenter.js
46 ms
css
61 ms
analytics.js
106 ms
prettify.css
16 ms
Ispxt4LCPn2XQWBONRuxjQ-VitalSource_support.png
73 ms
search_icon.png
288 ms
VST_Footer_Small.png
58 ms
ios.jpg
282 ms
android_kf.jpg
281 ms
mac_pc.jpg
318 ms
online.jpg
321 ms
bookmark.png
319 ms
homepage_bullet_icon.png
320 ms
vzIUHo9z-oJ4WgkpPOtg1_esZW2xOQ-xsNqO47m55DA.woff
188 ms
Hgo13k-tfSpn0qi1SFdUfT8E0i7KZn-EPnyo3HZu7kw.woff
199 ms
2UX7WLTfW3W8TclTUvlFyQ.woff
207 ms
RxZJdnzeo3R5zSexge8UUT8E0i7KZn-EPnyo3HZu7kw.woff
221 ms
d-6IYplOFocCacKzxwXSOD8E0i7KZn-EPnyo3HZu7kw.woff
222 ms
entypo.svg
236 ms
entypo.woff
181 ms
collect
130 ms
support.vitalsource.com 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
[aria-*] attributes do not match their roles
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
[id] attributes on active, focusable elements are not unique
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
support.vitalsource.com 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
support.vitalsource.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Support.vitalsource.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Support.vitalsource.com 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.
support.vitalsource.com
Open Graph description is not detected on the main page of Support Vital Source. 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: