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Pause Worklets and Dedicated Workers Execution on document freeze

Category

Performance

Type

New or changed feature

Status

In developer trial (Behind a flag) (Chrome 76)

Intent stage

Start prototyping

Summary

Dedicated workers and worklets continue to execute even though documents may be frozen due to the page lifecycle.

Motivation

All threads in a frozen document should be frozen.

Standards & signals

• Specification: https://wicg.github.io/page-lifecycle/spec.html
• Firefox: No signal — Firefox does this for workers going into bfcache.
• Safari: No signal
• Web developers: No signals
• Tracking bug: https://crbug.com/957589

Docs: https://github.com/WICG/page-lifecycle/pull/35

Explainers: https://github.com/WICG/page-lifecycle/pull/35

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