WebSocket: binaryType property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The WebSocket.binaryType property controls the type of
binary data being received over the WebSocket connection.
Value
A string:
"blob"-
Use
Blobobjects for binary data. This is the default value. "arraybuffer"-
Use
ArrayBufferobjects for binary data.
Examples
js
// Create WebSocket connection.
const socket = new WebSocket("ws://localhost:8080");
// Change binary type from "blob" to "arraybuffer"
socket.binaryType = "arraybuffer";
// Listen for messages
socket.addEventListener("message", (event) => {
if (event.data instanceof ArrayBuffer) {
// binary frame
const view = new DataView(event.data);
console.log(view.getInt32(0));
} else {
// text frame
console.log(event.data);
}
});
Specifications
| Specification |
|---|
| WebSockets # ref-for-dom-websocket-binarytype① |
Browser compatibility
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