You can set filters, data, buttons and all of the fields available on [OneSignal Documentation](https://documentation.onesignal.com/reference#create-notification)
by using `postBody` JSON variable.
```js
varfirstNotification=newOneSignal.Notification({
contents:{
en:"Test notification",
tr:"Test mesajı"
},
contents:{"en":"Old content"}
});
// You can change notification body later by changing postBody
You can set filters, data, buttons and all of the fields available on [OneSignal Documentation](https://documentation.onesignal.com/reference#create-notification)
by using `postBody` JSON variable.
```js
varfirstNotification=newOneSignal.Notification({
contents:{
en:"Test notification",
tr:"Test mesajı"
},
contents:{"en":"Old content"}
});
// You can change notification body later by changing postBody