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Report Summary

About Website

Click here to check amazing Onlinebooksconnect Elsevier content for China. Otherwise, check out these important facts you probably never knew about onlinebooksconnect.elsevier.com

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name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

66/100

25%

SI (Speed Index)

Value5.8 s

50/100

10%

TBT (Total Blocking Time)

Value300 ms

78/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value8.5 s

37/100

10%

sciencedirect

54 ms

6503577390251b4e2ae2.css

30 ms

80c8253e1b02a6fcf0d9.css

58 ms

polyfills-a40ef1678bae11e696dba45124eadd70.js

89 ms

webpack-984621082cc765cf096d.js

44 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Onlinebooksconnect.elsevier.com, 38% (14 requests) were made to Images.ctfassets.net and 3% (1 request) were made to Static.cloudflareinsights.com. The less responsive or slowest element that took the longest time to load (145 ms) relates to the external source Elsevier.com.

Content Size

648.8 kB

After Optimization

422.7 kB

In fact, the total size of Onlinebooksconnect.elsevier.com main page is 648.8 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. 60% of websites need less resources to load. Javascripts take 353.8 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 218.1 kB

Original 274.8 kB
After minification 274.8 kB
After compression 56.7 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 218.1 kB or 79% of the original size.

JavaScript Optimization

-2%

Potential reduce by 7.9 kB

Original 353.8 kB
After minification 353.8 kB
After compression 345.8 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 71 B

Original 20.2 kB
After minification 20.2 kB
After compression 20.1 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. Onlinebooksconnect.elsevier.com has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Onlinebooksconnect Elsevier. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and as a result speed up the page load time.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

High

Links are not crawlable

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Onlinebooksconnect.elsevier.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 Onlinebooksconnect.elsevier.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.

Social Sharing Optimization

onlinebooksconnect.elsevier.com

Open Graph data is detected on the main page of Onlinebooksconnect Elsevier. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

ScienceDirect | Peer-reviewed literature | Elsevier

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)