The forEach()
method of the DOMTokenList
interface calls the callback given in parameter once for each value pair in the list, in insertion order.
tokenList.forEach(callback); tokenList.forEach(callback, argument);
callback
currentValue
currentIndex
listObj
forEach()
is being applied to.argument
Optional
this
when executing callback
.In the following example we retrieve the list of classes set on a <span>
element as a DOMTokenList
using Element.classList
. We when retrieve an iterator containing the values using forEach()
, writing each one to the <span>
's Node.textContent
inside the forEach()
inner function.
First, the HTML:
<span class="a b c"></span>
Now the JavaScript:
var span = document.querySelector("span"); var classes = span.classList; var iterator = classes.values(); classes.forEach( function(value, key, listObj) { span.textContent += value + ' ' + key + "/" + this + ' ++ '; }, "arg" );
The output looks like this:
Specification | Status | Comment |
---|---|---|
DOM The definition of 'forEach() (as iterable<Node>)' in that specification. | Living Standard | Initial definition. |
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | (Yes) | No support | 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) |
DOMSettableTokenList
(object that extends DOMTokenList with settable .value property)
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/forEach