scheduler-polyfill

Scheduler Polyfill

This is a polyfill for the Prioritized Task Scheduling API. Documentation on the API shape along with examples can be found in the explainer.

The polyfill includes implementations of Scheduler, exposed through self.scheduler, as well as TaskController and TaskPriorityChangeEvent classes.

The implementation uses a combination of setTimeout, MessageChannel, and requestIdleCallback to implement task scheduling, falling back to setTimeout when other APIs are not available.

Usage

Requirements

A browser that supports ES6 is required for this polyfill.

Local Builds

Download and Build the Polyfill

git clone https://github.com/GoogleChromeLabs/scheduler-polyfill
cd scheduler-polyfill
npm i
npm test        # Tests should pass
npm run build   # Outputs minified polyfill to dist/

Usage in Browsers

The following will add self.scheduler if it does not exist, along with the TaskController and TaskPriorityChangeEvent classes.

<script src="/path_to_polyfill/scheduler-polyfill.js"></script>

License

Apache 2.0