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PushMessageData

The PushMessageData interface of the Push API provides methods which let you retrieve the push data sent by a server in various formats.

Unlike the similar methods in the Fetch API, which only allow the method to be invoked once, these methods can be called multiple times.

Messages received through the Push API are sent encrypted by push services and then automatically decrypted by browsers before they are made accessible through the methods of the PushMessageData interface.

Instance properties

None.

Instance methods

PushMessageData.arrayBuffer()

Extracts the data as an ArrayBuffer object.

PushMessageData.blob()

Extracts the data as a Blob object.

PushMessageData.json()

Extracts the data as a JSON object.

PushMessageData.text()

Extracts the data as a plain text string.

Examples

js

self.addEventListener("push", (event) => {
  const obj = event.data.json();

  if (obj.action === "subscribe" || obj.action === "unsubscribe") {
    fireNotification(obj, event);
    port.postMessage(obj);
  } else if (obj.action === "init" || obj.action === "chatMsg") {
    port.postMessage(obj);
  }
});

Specifications

Specification
Push API
# pushmessagedata-interface

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
PushMessageData 50 17 44 No 37
16Supported on macOS 13 and later
No 50 48 37 16.4 5.0
arrayBuffer 50 17 44 No 37
16Supported on macOS 13 and later
No 50 48 37 16.4 5.0
blob 50 17 44 No 37
16Supported on macOS 13 and later
No 50 48 37 16.4 5.0
json 50 17 44 No 37
16Supported on macOS 13 and later
No 50 48 37 16.4 5.0
text 50 17 44 No 37
16Supported on macOS 13 and later
No 50 48 37 16.4 5.0

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https://developer.mozilla.org/en-US/docs/Web/API/PushMessageData