BeforeInstallPrompt

在一个用户被提示”安装“一个网站到移动设备的一个主屏幕之前,  BeforeInstallPromptEvent 被Window.onbeforeinstallprompt 处理程序触发。

该接口继承自Event接口。

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Constructor

new window.BeforeInstallPromptEvent(name, eventInitOptions)

Creates a new BeforeInstallPromptEvent.

Properties

Inherits properties from its parent, Event.

BeforeInstallPromptEvent.platform 只读

Returns a DOMString containing the platform on which the event was dispatched.

BeforeInstallPromptEvent.userChoice 只读

Returns a Promise that resolves to a DOMString containing either 'installed' 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(outcome) { 
    console.log(outcome); // either "installed", "dismissed", etc. 
  }, handleError); 
});

Browser compatibility

[1] Behind the flagchrome://flags/#bypass-app-banner-engagement-checks