​x
 
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript 可迭代对象</h1>
​
<h2>遍历集合（Set）</h2>
​
<p id="demo"></p>
​
<script>
// 创建一个集合
const letters = new Set(["a", "b", "c"]);
​
// 列出所有元素
let text = "";
for (const x of letters) {
  text += x + "<br>";
}
​
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>
​