通过

PermissionRequest object

  • 项目

Note

The features described in this document are no longer being maintained. For more information on the new WebView2 control, see Introduction to Microsoft Edge WebView2 (Preview).

Provides information about a permission request. This object is available from the permissionRequest property of the event args from the MSWebViewPermissionRequested webview event.

webview.addEventListener("MSWebViewPermissionRequested", permissionRequestedEventArgs => {
    const permissionRequest = permissionRequestedEventArgs.permissionRequest;
    switch (permissionRequest.type) {
        case "geolocation":
        case "media":
        case "pointerlock":
        case "webnotifications":
        case "screen":
        case "immersiveview":
            if (permissionRequest.uri.startsWith("https://www.example.com/")) {
                // Implicitly trust particular URI
                permissionRequest.allow();
            }
            else if (permissionRequest.uri.startsWith("https://")) {
                // Defer the request so we can ask the user to allow or deny the request
                permissionRequest.defer();
                // Later we'll need to use webview.getDeferredPermissionRequestById for this
                // request and call allow or deny.
                promptUserForDeferredPermissionRequest(
                    permissionRequest.id,
                    permissionRequest.uri,
                    permissionRequest.type);
            }
            else {
                // Implicitly deny non-https URIs
                permissionRequest.deny();
            }
            break;

        case "unlimitedIndexedDBQuota":
        default:
            permissionRequest.deny();
            break;
    }
});

Methods

allow

Allows the request for permission.

Parameters

This method has no parameters.

Return value

This method does not return a value.

defer

If instead of synchronously allowing or disallowing a PermissionRequest, you require time to interact with the user or take some other asynchronous action, call defer() on the PermissionRequest. The PermissionRequest will now be available as a DeferredPermissionRequest from getDeferredPermissionRequests and getDeferredPermissionRequestById. You can correlate the current PermissionRequest with the corresponding DeferredPermissionRequest via the matching id property.

Parameters

This method has no parameters.

Return value

This method does not return a value.

deny

Denies the request for permission.

Parameters

This method has no parameters.

Return value

This method does not return a value.

Properties

id

A unique ID that can be used to correlate the current PermissionRequest with a corresponding DeferredPermissionRequest if the defer method is used. See the defer method.

This property is read-only.

Property value

Type: Unsigned long

state

Returns "unknown", "defer", "allow", or "deny" to indicate the current state of permission request. The state string will correspond to whichever method allow, deny, or defer was called last or "unknown" if none of the methods have been called.

This property is read-only.

Property value

Type: String

type

The type of permission being requested. This may be one of the following string values:

  • geolocation: access to location data via navigator.geolocation.
  • unlimitedIndexedDBQuota: allow IndexedDB APIs to ignore the usual stored data size limit.
  • media: access to the microphone and camera via navigator.getUserMedia.
  • pointerlock: ability to lock and control the mouse pointer via Element.requestPointerLock.
  • webnotifications: ability to show desktop notifications via window.Notification.
  • screen: ability to take screen shots via the Media Capture API.
  • immersiveview: ability to control a VR display.

This property is read-only.

Property value

Type: String

uri

The Uniform Resource Identifier (URI) of the document requesting permission.

This property is read-only.

Property value

Type: String