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.
Status
Limited availability
MDN documentation
Specifications
- HTML (#blocking-attributes), from HTML Workstream (WHATWG).
Browser support
- Chrome 105 Released on 2022-09-02
- Chrome Android 105 Released on 2022-09-02
- Edge 105 Released on 2022-09-01
- Firefox ❌ See bugzil.la/1751383 Vendor position : positive
- Firefox for Android ❌ See bugzil.la/1751383 Vendor position : positive
- Safari 18.2 Released on 2024-12-11
- Safari on iOS 18.2 Released on 2024-12-11
Baseline availability blocked since December 2024 by Firefox (10 months)
Developer signals
- State of HTML 2025: reading_list/reading_list question
- State of HTML 2025: features/all_features question
- State of HTML 2024: reading_list/reading_list question
- State of HTML 2024: features/all_features question
- State of HTML 2024: content/content_features question
- State of HTML 2023: reading_list/reading_list question
- State of HTML 2023: features/all_features question
- State of HTML 2023: content/content_features question
Usage (according to Chrome Platform Status)
~11.287% of page loads. More data at chromestatus.com.
Web Platform Tests (WPT)
View the latest WPT test results for this featureView as JSON | Edit this feature | Report an issue | Web-features entry: source, dist