The Permissions.query()
method of the Permissions
interface returns the state of a user permission on the global scope.
The Permissions.query()
method of the Permissions
interface returns the state of a user permission on the global scope.
js
query(permissionDescriptor)
permissionDescriptor
An object that sets options for the query
operation consisting of a comma-separated list of name-value pairs. The available options are:
name
The name of the API whose permissions you want to query. Each browser supports a different set of values. You'll find Firefox values there, Chromium values there, and WebKit values there.
userVisibleOnly
(Push only, not supported in Firefox — see the Browser Support section below) Indicates whether you want to show a notification for every message or be able to send silent push notifications. The default is false
.
sysex
(Midi only)Indicates whether you need and/or receive system exclusive messages. The default is false
.
Note: As of Firefox 44, the permissions for Notifications and Push have been merged. If permission is granted (e.g. by the user, in the relevant permissions dialog), navigator.permissions.query()
will return true
for both notifications
and push
.
Note: The persistent-storage
permission allows an origin to use a persistent box (i.e., persistent storage) for its storage, as per the Storage API.
A Promise
that resolves to a PermissionStatus
object.
Exception | Explanation |
---|---|
TypeError | Retrieving the PermissionDescriptor information failed in some way, or the permission doesn't exist or is currently unsupported (e.g. midi , or push with userVisibleOnly ). |
js
navigator.permissions.query({ name: "geolocation" }).then((result) => { if (result.state === "granted") { showLocalNewsWithGeolocation(); } else if (result.state === "prompt") { showButtonToEnableLocalNews(); } // Don't do anything if the permission was denied. });
Specification |
---|
Permissions # dom-permissions-query |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
query |
43 | 79 | 46 | No | 30 | 16 | No | 43 | 46 | 30 | 16 | 4.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/Permissions/query