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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The json()method of the PushMessageData interface extracts push message data by parsing it as a JSON string and returning the result.


var myData =;




The result of parsing push event data as JSON. This could be anything that can be represented by JSON — an object, an array, a string, a number...


self.addEventListener('push', function(event) {
  var myData =;

  // do something with your data


Specification Status Comment
Push API
The definition of 'json()' in that specification.
Working Draft Initial definition.

Browser Compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome Full support 50Edge ? Firefox Full support 44
Full support 44
Notes Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).
IE No support NoOpera Full support 37Safari No support NoWebView Android No support NoChrome Android Full support 50Edge Mobile ? Firefox Android Full support 48Opera Android Full support 37Safari iOS No support NoSamsung Internet Android Full support 5.0


Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

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