NodeList.keys()

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NodeList.keys() 方法返回 iterator ，此方法允许遍历这个对象中包含的所有的键，即使这个键是 unsigned integer（无符号整数）.

语法

keys()

返回值

返回 iterator.

示例

var node = document.createElement("div");
var kid1 = document.createElement("p");
var kid2 = document.createTextNode("hey");
var kid3 = document.createElement("span");

node.appendChild(kid1);
node.appendChild(kid2);
node.appendChild(kid3);

var list = node.childNodes;

// Using for..of
for (var key of list.keys()) {
  console.log(key);
}

结果是：

0
1
2

浏览器兼容性

BCD tables only load in the browser

参见

Node
NodeList