DOMTokenList.keys()

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

Document Tags and Contributors

 Contributors to this page: teoli
 Last updated by: teoli,