PeerJSExample/index.html at master · Juschwy/PeerJSExample · GitHub

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<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport"
              content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>PeerJS Example</title>
    </head>
    <body>
        <script src="https://unpkg.com/peerjs@1.5.2/dist/peerjs.min.js"></script>
        <p>
            <span id="myPeerId">My peer ID: pending...</span>
            <button id="copyBtn" disabled>Copy</button>
            <button id="shareBtn" disabled>Share</button>
        </p>
        <p>
            <label for="peerId">Connect to ID:</label>
            <input id="peerId" type="text">
            <button id="connectPeerIdBtn">Connect to ID</button>
        </p>
        <p>
            <label for="msg">Message:</label>
            <input disabled id="msg" type="text">
            <button disabled id="sendMsgBtn">Send Message</button>
        </p>
        <output id="output">

        </output>
        <script>
            let peer = new Peer("", { debug: 3 });
            const myPeerId = document.getElementById("myPeerId")
            const copyBtn = document.getElementById("copyBtn")
            const shareBtn = document.getElementById("shareBtn")
            const peerIdInput = document.getElementById("peerId")
            const connectPeerId = document.getElementById("connectPeerIdBtn")
            const msgInput = document.getElementById("msg")
            const sendMsg = document.getElementById("sendMsgBtn")
            const output = document.getElementById("output")

            const urlParams = new URLSearchParams(window.location.search);
            const connectTo = urlParams.get('connectTo');

            function addOutput(msg, inc){
                let para = document.createElement("p")
                para.innerText = (inc ? ">" : "<") + " " + msg
                output.appendChild(para)
            }

            function onConnection (conn){
                conn.on('open', function () {
                    console.log("conn open")
                    connectPeerId.disabled = true
                    peerIdInput.disabled = true
                    msgInput.disabled = false
                    sendMsg.disabled = false

                    conn.on('data', function (data) {
                        addOutput(data, true)
                    });

                    sendMsg.addEventListener("click", function () {
                        addOutput(msgInput.value, false)
                        conn.send(msgInput.value)
                        msgInput.value = ""
                    })
                });
            }

            function connect(peerId){
                connectPeerId.disabled = true
                peerIdInput.disabled = true

                let conn = peer.connect(peerId)
                onConnection(conn)
            }

            peer.on('open', function (id) {
                console.log('My peer ID is: ' + id);
                myPeerId.innerText = 'My peer ID: ' + id

                if (connectTo){
                    connect(connectTo)
                }

                copyBtn.disabled = false
                copyBtn.addEventListener("click", function (){
                    navigator.clipboard.writeText(id)
                    copyBtn.innerText = "✓ Copied"
                })
                shareBtn.disabled = false
                shareBtn.addEventListener("click", function (){
                    navigator.clipboard.writeText(location.origin + location.pathname + "?connectTo=" + id)
                    shareBtn.innerText = "✓ Shared"
                })
            });

            peer.on("connection", function(conn) {
                onConnection(conn)
            })

            connectPeerId.addEventListener("click", function () {
                connect(peerIdInput.value)
            })

        </script>
    </body>
</html>