この記事はまだボランティアによって 日本語 に翻訳されていません。ぜひ MDN に参加して翻訳を手伝ってください！
The NodeList.keys() method returns an iterator allowing to go through all keys contained in this object. The keys are unsigned integer.
Syntax
nodeList.keys();
Return value
Returns an iterator.
Example
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);
}
The result is:
0 1 2
Specifications
| Specification | Status | Comment |
|---|---|---|
| DOM The definition of 'keys() (as iterable)' in that specification. |
Living Standard | Initial definition |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | ? | 50 (50) | ? | ? | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | No support | ? | 50.0 (50) | ? | ? | ? | ? |