Limited Availability HTML

blocking="render"

The blocking="render" attribute for <link>, <script>, and <style> elements blocks rendering until the external script or stylesheet has been loaded. For <link rel="expect">, rendering is blocked until a specific element is in the DOM.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Dec 11, 2024.

Desktop Browser Engine Support

Google Chrome

105

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

18.2

Supported

Microsoft Edge

105

Supported

Mobile Browser Engine Support

Chrome Android

105

Firefox Android

—

Safari iOS

18.2

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.HTMLLinkElement.blocking ↗ api.HTMLScriptElement.blocking ↗ api.HTMLStyleElement.blocking ↗ html.elements.link.blocking ↗ html.elements.script.blocking ↗ html.elements.style.blocking ↗