html运行实例（jsck_keys）-搜寻教程库

代码示例：（标识：jsck_keys）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组</h1>

<p>keys() 方法返回带有数组键的 Array Iterator 对象。</p>

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

<script>
const fruits = ["Banana", "Orange", "Apple", "Mango"];
const keys = fruits.keys();

let text = "";
for (let x of keys) {
  text += x + "<br>";
}

document.getElementById("demo").innerHTML = text;
</script>

<p>Internet Explorer 不支持 keys() 方法。</p>

</body>
</html>