Preload Critical Scripts to Improve Page Load Performance

JavaScript Analyzer

What is this warning?

An important JavaScript file is being discovered late by the browser, which delays the interactivity of your page. You can give the browser a heads-up to download this file sooner by 'preloading' it. This can significantly improve your page's load time and user experience.

How to Fix This Issue

How to Fix It

The Problem

A critical script is loaded normally, without being prioritized.

The Solution

Add a `<link rel="preload">` tag for the script in the <head> of your HTML. This tells the browser to start downloading it with a high priority.

<link rel="preload" href="/js/critical-script.js" as="script">

Why This Works

Preloading separates downloading from execution. It ensures the script is ready to be executed the moment it's needed, which can improve metrics like Time to Interactive (TTI). For more details, see Google's documentation on preloading critical assets.

SEO Impact

This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.

Automatic Detection

Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.

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