The forEach() method of the DOMTokenList interface calls the callback given in parameter once for each value pair in the list, in insertion order.
DOMTokenList.forEach()
Syntax
forEach(callback); forEach(callback, thisArg);
Parameters
-
callback -
The function to execute for each element, eventually taking three arguments:
-
currentValue -
The current element being processed in the array.
-
currentIndex -
The index of the current element being processed in the array.
-
listObj -
The array that
forEach()is being applied to.
-
-
thisArgOptional -
The value to use as
thiswhen executingcallback.
Return value
None.
Example
In the following example we retrieve the list of classes set on a <pre> element as a DOMTokenList using Element.classList. We when retrieve an iterator containing the values using forEach(), writing each one to the <pre>'s Node.textContent inside the forEach() inner function.
HTML
<pre class="a b c"></pre>
JavaScript
const pre = document.querySelector("pre"); const classes = pre.classList; const iterator = classes.values(); classes.forEach( function(value, key, listObj) { pre.textContent += `(${value}${key})/${this}\n`; }, "arg" );
Result
Specifications
No specification found
No specification data found for api.DOMTokenList.forEach.
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Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
forEach |
42
|
16
|
50
|
No
|
32
|
10.1
|
45
|
45
|
50
|
32
|
10.3
|
5.0
|
See also
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/forEach
