Contact emails
wei4.w...@intel.com<mailto:wei4.w...@intel.com>


Explainer
https://github.com/w3c/webappsec-permissions-policy


Specification
https://w3c.github.io/battery/#permissions-policy-integration


Summary
Battery status API gated by permissions policy provides developers with a way 
to control this API availability.

Blink component
Blink>BatteryStatus<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EBatteryStatus>


Motivation
The Battery Status API provides a way to check host device battery status. This 
might be important e.g. for applications which need to ensure enough power is 
available for completing a task. Unfortunately this kind of API can be misused 
for fingerprinting, profiling etc. By gating the Battery Status API using a 
permissions policy, developers will be able to disable this API within their 
applications, and in third-party components.


Initial public proposal



TAG review



TAG review status
Not applicable


Risks



Interoperability and Compatibility


Gecko: No signal

WebKit: No signal

Web developers: No signals

Other signals:


WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it 
has potentially high risk for Android WebView-based applications?



Debuggability



Is this feature fully tested by 
web-platform-tests<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes, see https://github.com/web-platform-tests/wpt/tree/master/battery-status


Flag name



Requires code in //chrome?
False


Tracking bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1007264


Estimated milestones

No milestones specified


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5134470074597376

This intent message was generated by Chrome Platform 
Status<https://chromestatus.com/>.

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