W3School TIY Editor

<!DOCTYPE html>
<html>
<head>
<style>
div {
  background: yellow;
  border: 1px solid black;
  padding: 10px;
}
</style>
</head>
<body>

<p>本例使用 addEventListener() 方法将 "contextmenu" 事件附加到 div 元素。</p>

<div id="myDIV" contextmenu="mymenu">
<p>在此框中右键单击以查看上下文菜单！

</div>

function myFunction() {
  var x = document.getElementById("demo");
  x.innerHTML = "You right-clicked inside div!";
  x.style.fontSize = "30px";
}
</script>

<p><b>注释：</b>contextmenu 属性仅适用于 Firefox！</p>

</body>
</html>