Pmu.fr

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn more.

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn more.

Redirects introduce additional delays before the page can be loaded. Learn more.

Keep the server response time for the main document short because all other requests depend on it. Learn more.

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn more.

Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. Learn more.

Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes. Learn more.

Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn More

Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading. Learn more.

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn more

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn more

A long cache lifetime can speed up repeat visits to your page. Learn more.

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn more.

This is the largest contentful element painted within the viewport. Learn More

To set budgets for the quantity and size of page resources, add a budget.json file. Learn more.

Animations which are not composited can be janky and increase CLS. Learn more

Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay. Learn more

These DOM elements contribute most to the CLS of the page.

The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. Learn more.

Meta descriptions may be included in search results to concisely summarize page content. Learn more. Description text is empty.

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more.

Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px. Learn more.

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more.

The `unload` event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Consider using the `pagehide` or `visibilitychange` events instead. Learn more

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers. Learn more.

Add `rel="noopener"` or `rel="noreferrer"` to any external links to improve performance and prevent security vulnerabilities. Learn more.

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more.

A strong Content Security Policy (CSP) significantly reduces the risk of cross-site scripting (XSS) attacks. Learn more

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn more.

The service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. Learn more.

A maskable icon ensures that the image fills the entire shape without being letterboxed when installing the app on a device. Learn more.

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn more.

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more.

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more.

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more.

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more.

Low-contrast text is difficult or impossible for many users to read. Learn more.