Web/API/BeforeInstallPromptEvent/prompt

The prompt() method of the BeforeInstallPromptEvent interface allows a developer to show the install prompt at a time of their own choosing. 

Syntax

BeforeInstallPromptEvent.prompt()

Parameters

None.

Returns

An empty Promise.

Example

var 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
  // ...
});

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
prompt Experimental'Non-standard'	Chrome Full support 45	Edge Full support ≤79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support 45	Chrome Android Full support 45	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 5.0

Legend

Full support  

Full support

No support  

No support

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

Non-standard. Expect poor cross-browser support.'

Non-standard. Expect poor cross-browser support.

BeforeInstallPromptEvent.prompt() by Mozilla Contributors is licensed under CC-BY-SA 2.5.