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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support50 ?441 No37 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No50 ?4837 No5.0

1. Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).

Document Tags and Contributors

Contributors to this page: RickBrown, fscholz, chrisdavidmills, jpmedley
Last updated by: RickBrown,