BeforeInstallPromptEvent.prompt()

这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

BeforeInstallPromptEvent 接口的 prompt()方法允许一个开发人员在自己选择的一个时间显示安装提示。

句法

BeforeInstallPromptEvent.prompt()

参数

返回

一个空的 Promise.

范例

let isTooSoon = true;
window.addEventListener("beforeinstallprompt", function(e) {
  if (isTooSoon) {
    e.preventDefault(); // Prevents prompt display
    // Prompt later instead:
    setTimeout(function() {
      isTooSoon = false;
      e.prompt(); // Throws if called more than once or default not prevented
    }, 10000);
  }

  // The event was re-dispatched in response to our request
  // ...
});

规范

This method is not part of a specification.

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 45.0 [1]        
Feature Android Android Webview Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support 未实现 45.0 [1]           45.0 [1]

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

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