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BeforeInstallPromptEvent - Web APIs 编辑

The BeforeInstallPromptEvent is fired at the Window.onbeforeinstallprompt handler before a user is prompted to "install" a web site to a home screen on mobile.

This interface inherits from the Event interface.

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Constructor

BeforeInstallPromptEvent(): Creates a new BeforeInstallPromptEvent.

Properties

Inherits properties from its parent, Event.

BeforeInstallPromptEvent.platforms Read only: Returns an array of DOMString items containing the platforms on which the event was dispatched. This is provided for user agents that want to present a choice of versions to the user such as, for example, "web" or "play" which would allow the user to chose between a web version or an Android version.
BeforeInstallPromptEvent.userChoice Read only: Returns a Promise that resolves to a DOMString containing either "accepted" or "dismissed".

Methods

BeforeInstallPromptEvent.prompt(): Allows a developer to show the install prompt at a time of their own choosing. This method returns a Promise.

Example

window.addEventListener("beforeinstallprompt", function(e) {
  // log the platforms provided as options in an install prompt
  console.log(e.platforms); // e.g., ["web", "android", "windows"]
  e.userChoice.then(function(choiceResult) {
    console.log(choiceResult.outcome); // either "accepted" or "dismissed"
  }, handleError);
});