Tools & Wizards About Us
cengagebrain.vitalsource.com screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 69% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

cengagebrain.vitalsource.com

VitalSource Bookshelf Online

Page Load Speed

789 ms in total

First Response

65 ms

Resources Loaded

617 ms

Page Rendered

107 ms

cengagebrain.vitalsource.com screenshot

About Website

Click here to check amazing Cengagebrain Vital Source content for United States. Otherwise, check out these important facts you probably never knew about cengagebrain.vitalsource.com

VitalSource Bookshelf is the world’s leading platform for distributing, accessing, consuming, and engaging with digital textbooks and course materials.

Visit cengagebrain.vitalsource.com

Key Findings

We analyzed Cengagebrain.vitalsource.com page load time and found that the first response time was 65 ms and then it took 724 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

cengagebrain.vitalsource.com performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value32.7 s

0/100

10%

LCP (Largest Contentful Paint)

Value39.9 s

0/100

25%

SI (Speed Index)

Value32.7 s

0/100

10%

TBT (Total Blocking Time)

Value1,320 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.011

100/100

15%

TTI (Time to Interactive)

Value40.7 s

0/100

10%

Network Requests Diagram

cengagebrain.vitalsource.com

65 ms

cengagebrain.vitalsource.com

140 ms

vendor.min-0e128173.js

153 ms

box.js

211 ms

fraction.min-76ad88e3.js

230 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 86% of them (12 requests) were addressed to the original Cengagebrain.vitalsource.com, 7% (1 request) were made to Jigsaw.vitalsource.com and 7% (1 request) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (230 ms) belongs to the original domain Cengagebrain.vitalsource.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 565.2 kB (73%)

Content Size

772.5 kB

After Optimization

207.3 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Cengagebrain.vitalsource.com main page is 772.5 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. Javascripts take 587.3 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 2.5 kB

  • Original 3.6 kB
  • After minification 3.5 kB
  • After compression 1.2 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 2.5 kB or 68% of the original size.

JavaScript Optimization

-69%

Potential reduce by 406.1 kB

  • Original 587.3 kB
  • After minification 587.3 kB
  • After compression 181.1 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 406.1 kB or 69% of the original size.

CSS Optimization

-86%

Potential reduce by 156.6 kB

  • Original 181.5 kB
  • After minification 181.4 kB
  • After compression 25.0 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. Cengagebrain.vitalsource.com needs all CSS files to be minified and compressed as it can save up to 156.6 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (25%)

Requests Now

12

After Optimization

9

  • AJAX
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cengagebrain 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 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

cengagebrain.vitalsource.com

cengagebrain.vitalsource.com

65 ms

cengagebrain.vitalsource.com

cengagebrain.vitalsource.com

140 ms

vendor.min-0e128173.js

vendor.min-0e128173.js

153 ms

box.js

box.js

211 ms

fraction.min-76ad88e3.js

fraction.min-76ad88e3.js

230 ms

fraction.min-9318f284.css

fraction.min-9318f284.css

126 ms

analytics.js

analytics.js

51 ms

cengagebrain.vitalsource.com.json

cengagebrain.vitalsource.com.json

42 ms

roboto-v15-latin-regular.woff

roboto-v15-latin-regular.woff

34 ms

roboto-v15-latin-500.woff

roboto-v15-latin-500.woff

42 ms

roboto-v15-latin-300.woff

roboto-v15-latin-300.woff

104 ms

roboto-v15-latin-100.woff

roboto-v15-latin-100.woff

58 ms

roboto-v15-latin-700.woff

roboto-v15-latin-700.woff

61 ms

roboto-v15-latin-900.woff

roboto-v15-latin-900.woff

61 ms

Accessibility Review

cengagebrain.vitalsource.com accessibility score

88

Accessibility Issues

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

High

[aria-*] attributes do not have valid values

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

cengagebrain.vitalsource.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

cengagebrain.vitalsource.com SEO score

73

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cengagebrain.vitalsource.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Cengagebrain.vitalsource.com main page’s claimed encoding is iso-8859-1. 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.

Social Sharing Optimization

cengagebrain.vitalsource.com

Open Graph description is not detected on the main page of Cengagebrain 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: