navigator.mozApps.amInstalled

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已废弃
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

Summary

Provides a means for an app to check whether it is installed. This function is typically called from an origin that hosts an app.

Syntax

navigator.mozApps.amInstalled( callback )

Parameters

callback
A callback function; it is called with one argument: an App object if the app is installed, or null if not.

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