​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript Set 对象</h1>
​
<p>对于 Set，typeof 返回object</p>
​
<p id="demo"></p>
​
<script>
// 创建新的 Set
const letters = new Set(["a","b","c"]);
​
// 打印
document.getElementById("demo").innerHTML = "letters的类型是：" + typeof letters;
</script>
​
</body>
</html>