This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The Permissions.revoke() method of the Permissions interface reverts a currently set permission back to its default state, which is usually prompt.
Syntax
This method is called on the global Permissions object navigator.permissions.
var revokePromise = navigator.permissions.revoke(descriptor);
Parameters
descriptor- An object based on the
PermissionDescriptordictionary that sets options for the 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. Valid values are'geolocation','midi','notifications', and'push'.userVisibleOnly: (Push only, not supported in Firefox — see the Browser compatibility section below) Indicates whether you want to show a notification for every message or be able to send silent push notifications. The default isfalse.sysex: (MIDI only) Indicates whether you need and/or receive system exclusive messages. The default isfalse.
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.
Returns
A Promise that calls its fulfillment handler with a PermissionStatus object indicating the result of the request.
Exceptions
TypeError- Retrieving the
PermissionDescriptorinformation failed in some way, or the permission doesn't exist or is currently unsupported (e.g.midi, orpushwithuserVisibleOnly).
Example
This function can be used by an app to request that its own Geolocation API permission be revoked.
function revokePermission() {
navigator.permissions.revoke({name:'geolocation'}).then(function(result) {
report(result.state);
});
}
Specification
| Specification | Status | Comment |
|---|---|---|
| Permissions API The definition of 'revoke()' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | ? | 47 (47) 49 (49)[1] 51 (51)[2] |
? | ? | ? |
persistent-storage |
? | 53 (53) | ? | ? | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | No support | ? | 47.0 (47) 49.0 (49)[1] 51.0 (51)[2] |
? | ? | ? | 43.0 |
persistent-storage |
No support | ? | 53.0 (53) | ? | ? | ? | ? |
[1] As of version 49, Firefox no longer supports the 'push' PermissionDescriptor dictionary type (referred to in the spec as PushPermissionDescriptor); this is because Firefox relies on a quota system for controlling the userVisibleOnly status instead, and was throwing an error when it encountered a PushPermissionDescriptor instance. With this dictionary removed, Firefox now simply ignores it.
[2] Starting in Firefox 51, this method is only available if the preference dom.permissions.revoke.enable is true. It is false by default. This was done because there are discussions ongoing about the design of this method, and even whether it should exist at all. Because of the sensitive nature of its function, Mozilla decided to disable it by default. See bug 1295877, comment 0 for details.