Web features explorer

Scheduler API

Limited availability

The scheduler API provides a way to prioritize all tasks belonging to an application.

Browser support

  • Chrome 129 Released on 2024-09-17
  • Chrome Android 129 Released on 2024-09-17
  • Edge 129 Released on 2024-09-19
  • Firefox 142 Released on 2025-08-19
  • Firefox for Android 142 Released on 2025-08-19
  • Safari Not supported
  • Safari on iOS Not supported

Baseline availability blocked since August 2025 by Safari (11 months)

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MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~12.340% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

Surveys

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