What is the purpose of <link rel="preload">?

Q: What is the purpose of ?

The ` ` element is used to tell the browser to fetch a resource (like a script, stylesheet, font, or image) early, before it is actually needed. This helps improve page load performance by loading critical resources sooner. Preloading allows the browser to prioritize fetching important resources. Useful for fonts, scripts, stylesheets, or images that are critical for rendering above-the-fold content. Requires specifying the `as` attribute to indicate the type of resource (`script`, `style`, `image`, `font`, etc.). Helps reduce render-blocking delays and improve perceived page speed. In short: Use ` ` to instruct the browser to fetch important resources early, improving page rendering speed and user experience.

Difficulty: 5/10

resource hint, performance optimization, critical rendering path

Preloading Resources in HTML

The <link rel="preload"> element is used to tell the browser to fetch a resource (like a script, stylesheet, font, or image) early, before it is actually needed. This helps improve page load performance by loading critical resources sooner.

Key Points About Preload

1
Preloading allows the browser to prioritize fetching important resources.
2
Useful for fonts, scripts, stylesheets, or images that are critical for rendering above-the-fold content.
3
Requires specifying the as attribute to indicate the type of resource (script, style, image, font, etc.).

Example Usage

In short: Use <link rel="preload"> to instruct the browser to fetch important resources early, improving page rendering speed and user experience.

Scenario Questions

0-2 years experience

Follow-up Questions