Access vivelessvt.com. Bienvenue sur le site consacré aux SVT ! Les sciences de la vie et de la Terre au collège et au lycé...

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

6/100

10%

LCP (Largest Contentful Paint)

Value13.8 s

0/100

25%

SI (Speed Index)

Value19.6 s

0/100

10%

TBT (Total Blocking Time)

Value640 ms

46/100

30%

CLS (Cumulative Layout Shift)

Value0.2

62/100

15%

TTI (Time to Interactive)

Value24.3 s

0/100

10%

www.vivelessvt.com

1418 ms

dfd_icon_set.css

172 ms

style.min.css

179 ms

front_end_style.css

171 ms

dashicons.min.css

184 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 78% of them (69 requests) were addressed to the original Vivelessvt.com, 11% (10 requests) were made to Fonts.gstatic.com and 3% (3 requests) were made to Servedby.revive-adserver.net. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Vivelessvt.com.

Content Size

4.3 MB

After Optimization

3.3 MB

In fact, the total size of Vivelessvt.com main page is 4.3 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. Only a small number of websites need less resources to load. Images take 3.1 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 697.6 kB

Original 782.6 kB
After minification 776.8 kB
After compression 85.0 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. 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 697.6 kB or 89% of the original size.

Image Optimization

-13%

Potential reduce by 393.3 kB

Original 3.1 MB
After minification 2.7 MB

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. Obviously, Vive Les SVT needs image optimization as it can save up to 393.3 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 1.3 kB

Original 194.1 kB
After minification 194.1 kB
After compression 192.8 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

-1%

Potential reduce by 3.2 kB

Original 319.2 kB
After minification 318.8 kB
After compression 316.0 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. Vivelessvt.com has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vive Les SVT. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

ARIA input fields do not have accessible names

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

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

High

Image elements do not have [alt] attributes

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

FR
Language Claimed

FR
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vivelessvt.com can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and it matches the claimed language. Our system also found out that Vivelessvt.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

vivelessvt.com

Open Graph data is detected on the main page of Vive Les SVT. 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

Bienvenue sur le site consacré aux SVT ! Les sciences de la vie et de la Terre au collège et au lycée - Cours de SVT en ligne avec Vive les SVT !

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)

Network Requests Diagram

www.vivelessvt.com

dfd_icon_set.css

style.min.css

front_end_style.css

dashicons.min.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

www.vivelessvt.com

dfd_icon_set.css

style.min.css

front_end_style.css

dashicons.min.css

desktop_style.css

cookie-law-info-public.css

cookie-law-info-gdpr.css

trp-language-switcher.css

visual-composer.css

app.css

mobile-responsive.css

style.css

js_composer.min.css

css

jquery.min.js

jquery-migrate.min.js

cookie-law-info-public.js

js

asyncjs.php

so-css-dfd-ronneby.css

animate.min.css

cookie-law-info-table.css

jquery.form.min.js

compresed.min.js

js_composer_front.min.js

vc-waypoints.min.js

jquery.particleground.min.js

widgets.js

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