代码示例:(标识:js_set_typeof)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Set 对象</h2>

<p>typeof 运算符返回 object:</p>

<p id="demo"></p>

<script>
// 创建新的 Set
const letters = new Set(["a","b","c"]);

// 显示 typeof
document.getElementById("demo").innerHTML = typeof letters;
</script>

</body>
</html>
运行结果: