Feature-Policy: wake-lock

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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The HTTP Feature-Policy header wake-lock directive controls whether the current document is allowed to use Wake Lock API to indicate that device should not enter power-saving mode.

Syntax

Feature-Policy: wake-lock <allowlist>;
<allowlist>

An allowlist is a list of origins that takes one or more of the following values:

  • *: The feature will be allowed in this document, and all nested browsing contexts (iframes) regardless of their origin.
  • 'self': The feature will be allowed in this document, and in all nested browsing contexts (iframes) in the same origin.
  • 'src': (In an iframe allow attribute only) The feature will be allowed in this iframe, as long as the document loaded into it comes from the same origin as the URL in the iframe's src attribute.
  • 'none': The feature is disabled in top-level and nested browsing contexts.
  • <origin(s)>: The feature is allowed for specific origins (for example, https://example.com). Origins should be separated by a space.

The values * (enable for all origins) or 'none' (disable for all origins) may only be used alone, while 'self' and 'src' may be used with one or more origins.

Features are each defined to have a default allowlist, which is one of:

  • *: The feature is allowed by default in top-level browsing contexts and all nested browsing contexts (iframes).
  • 'self': The feature is allowed by default in top-level browsing contexts and in nested browsing contexts (iframes) in the same origin. The feature is not allowed in cross-origin documents in nested browsing contexts.
  • 'none': The feature is disabled in top-level and nested browsing contexts.

Default policy

Default allow list for wake-lock is 'self'.

Specifications

Specification Status Comment
Feature Policy Editor's Draft Initial definition.
Wake Lock API 1 Candidate Recommendation Initial definition of wake-lock feature directive.

Browser compatibility

No compatibility data found. Please contribute data for "http.headers.Feature-Policy.wake-lock" (depth: 1) to the MDN compatibility data repository.

See also

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