BeforeInstallPromptEvent: prompt() method
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The prompt()
method of the BeforeInstallPromptEvent
interface allows a developer to show the
install prompt at a time of their own choosing. Typically this will be called in the event handler for the app's custom install UI.
This method must be called in the event handler for a user action (such as a button click) and may only be called once on a given BeforeInstallPromptEvent
instance.
Syntax
prompt()
Parameters
None.
Return value
A Promise
resolving to an object containing the following properties:
outcome
Experimental Non-standard-
A string indicating whether the user chose to install the app or not. It must be one of the following values:
"accepted"
: The user installed the app."dismissed"
: The user did not install the app.
platform
Experimental Non-standard-
If the user chose to install the app, this is a string naming the selected platform, which is one of the values from the
BeforeInstallPromptEvent.platforms
property. If the user chose not to install the app, this is an empty string.
Examples
Browser compatibility
BCD tables only load in the browser
See also
- Making PWAs installable
- How to provide your own in-app install experience on web.dev (2021)