Decrease the total number of render blocking resources using techniques such as bundling (this also means fewer HTTP requests).

Make them non-render blocking resources by deferring their download.

There are three ways to reduce the number and impact of render blocking resources: If you reduce the number of render blocking resources, you can shorten the critical rendering path and reduce page load times, thus improving the user experience and search engine optimization.

Find and remove unused CSS and JavaScript.

Use the defer and async attributes to eliminate render-blocking JavaScript.Use the media attribute for conditional CSS.Identify your render blocking resources.In this article, I will review nine tips and tricks to eliminate render blocking resources. Besides, you can also decrease the number and/or size of render blocking resources that are still critical and can’t be eliminated. There are best practices you can use to turn these noncritical render blocking resources into non-render blocking ones. However, not all resources that the browser deems render blocking are essential for the first paint it all depends on the individual characteristics of the page. The browser can safely download them in the background after the initial page render. On the other hand, non-render blocking resources don’t postpone the rendering of the page. In the meantime, the entire rendering process is put on hold. When the browser encounters a render blocking resource, it stops downloading the rest of the resources until these critical files are processed. Render blocking resources are static files, such as fonts, HTML, CSS, and JavaScript files, that are vital to the process of rendering a web page. 9 tricks to eliminate render blocking resourcesĮditor’s note: This article was updated on 28 January 2022 to include information about the release of Google’s Core Web Vitals. Head to her personal blog Annalytic for more content. Anna Monus Follow Anna is a technical writer who covers frontend frameworks, web standards, accessibility, WordPress development, UX design, and more.

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