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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 interface of the Permissions API provides the core Permission API functionality, such as methods for querying and revoking permissions
Methods
Permissions.query()- Returns the user permission status for a given API.
Permissions.request()- Requests permission to use a given API. This is not currently supported in any browser.
Permissions.revoke()- Revokes the permission currently set on a given API.
Example
navigator.permissions.query({name:'geolocation'}).then(function(result) {
if (result.state == 'granted') {
showLocalNewsWithGeolocation();
} else if (result.state == 'prompt') {
showButtonToEnableLocalNews();
}
// Don't do anything if the permission was denied.
});
Specification
| Specification | Status | Comment |
|---|---|---|
| Permissions API The definition of 'Permissions' in that specification. |
Editor's Draft | Initial definition. |
Browser Support
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 43.0 | 46 (46) | ? | ? | ? |
revoke() |
? | 47 (47)[1] | ? | ? | ? |
persistent-storage permission name |
? | 53 (53) | ? | ? | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | No support | 43.0 | 46.0 (46) | ? | ? | ? | 43.0 |
revoke() |
? | ? | ? | ? | ? | ? | ? |
persistent-storage permission name |
? | ? | 53.0 (53) | ? | ? | ? | ? |
[1] Starting in Firefox 51, revoke() 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.