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

See also

• DOMSettableTokenList (object that extends DOMTokenList with settable .value property)