web api instance property
RTCDataChannel: binaryType property
The property binaryType on the
RTCDataChannel interface is a string which specifies
the type of object which should be used to represent binary data received
on the RTCDataChannel. Values allowed by the
binaryType property are also permitted here:
blob if Blob objects are being used or
arraybuffer if ArrayBuffer objects are being used. The
default is arraybuffer.
When a binary message is received on the data channel, the resulting
message event’s data property is an object of
the type specified by the binaryType.
Value
A string that can have one of these values:
"blob"- : Received binary messages’ contents will be contained in
Blobobjects.
- : Received binary messages’ contents will be contained in
"arraybuffer"- : Received binary messages’ contents will be contained in
ArrayBufferobjects.
- : Received binary messages’ contents will be contained in
Example
This code configures a data channel to receive binary data in
ArrayBuffer objects, and establishes a listener for message
events which constructs a string representing the received data as a list of hexadecimal
byte values.
const dc = peerConnection.createDataChannel("Binary");
dc.binaryType = "arraybuffer";
dc.onmessage = (event) => {
const byteArray = new Uint8Array(event.data);
let hexString = "";
byteArray.forEach((byte) => {
hexString += `${byte.toString(16)} `;
});
};