JavaScript 支持不同类型的循环：
==只看For/In循环==
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript 循环</h1>
<p>for/in 语句循环遍历对象的属性。</p>
<p id="demo"></p>
<script>
var txt = "";
var person = {fname:"Bill", lname:"Gates", age:62};
var x;
for (x in person) {
txt += person[x] + " ";
}
document.getElementById("demo").innerHTML = txt;
</script>
</body>
</html>结果：
Javascript 循环
for/in 语句循环遍历对象的属性。
Bill Gates 62原文：https://www.cnblogs.com/heliusKing/p/11489244.html