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<script src="https://unpkg.com/peerjs@1.5.1/dist/peerjs.min.js"></script>

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npm i peerjs

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// 新建实例
var peer = new Peer();

// 创建 peer，如果新建实例时未携带 id 参数，则此处会自动赋值随机唯一 id
peer.on('open', function(id) {
	console.log('My peer ID is: ' + id);
  });

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var conn = peer.connect('dest-peer-id');

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peer.on('connection', function(conn) { ... });

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conn.on('open', function() {
	// 接收数据
	conn.on('data', function(data) {
	  console.log('Received', data);
	});

	// 发送数据
	conn.send('Hello!');
  });

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// Call a peer, providing our mediaStream
var call = peer.call('dest-peer-id', mediaStream);

call.on('stream', function(stream) {
	// `stream` is the MediaStream of the remote peer.
	// Here you'd add it to an HTML video/canvas element.
  });

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peer.on('call', function(call) {
    // Answer the call, providing our mediaStream
    call.answer(mediaStream);
});

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const peer = new Peer（[id]， [options]）;

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const dataConnection = peer.connect(id, [options]);

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const mediaConnection = peer.call(id, stream, [options]);

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peer.disconnect();

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peer.reconnect();

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peer.destroy();

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peer.on(event, callback);

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const dataConnection = peer.connect(id, [options]);

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dataConnection.on(event, callback);

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const mediaConnection = peer.call(id, stream, [options]);

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mediaConnection.on(event, callback);