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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
</head>
<body>
  
    <button id="btn1">按鈕一</button><br>
    <button id="btn2">按鈕二</button><br>
    <div id="console"></div>
  
<script type="text/javascript">
    function handler() {
        document.getElementById('console').innerHTML 
            = `Who's clicked: ${this.id}`;
    }
    document.getElementById('btn1').onclick = handler;
    document.getElementById('btn2').onclick = handler;
</script>
</body>
</html>
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public
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JustinSDKpro
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