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The DOMTokenList.keys() method returns an iterator allowing to go through all keys contained in this object. The keys are unsigned integer.
Syntax
tokenList.keys();
Return value
Returns an iterator.
Example
var node = document.createElement("div");
node.classList.add("class1");
node.classList.add("class2");
node.classList.add("class3");
for(var key of node.classList.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 | (Yes) | 50 (50) | ? | (Yes) | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | No support | (Yes) | 50.0 (50) | ? | (Yes) | ? | (Yes) |
See also
DOMSettableTokenList(object that extends DOMTokenList with settable .value property)