The forEach()
method of the NodeList
interface calls the callback given in parameter once for each value pair in the list, in insertion order.
The forEach()
method of the NodeList
interface calls the callback given in parameter once for each value pair in the list, in insertion order.
js
forEach(callback) forEach(callback, thisArg)
callback
A function to execute on each element of someNodeList
. It accepts 3 parameters:
currentValue
The current element being processed in someNodeList
.
currentIndex
Optional
The index of the currentValue
being processed in someNodeList
.
listObj
Optional
The someNodeList
that forEach()
is being applied to.
thisArg
Optional
Value to use as this
when executing callback
.
js
const node = document.createElement("div"); const kid1 = document.createElement("p"); const kid2 = document.createTextNode("hey"); const kid3 = document.createElement("span"); node.appendChild(kid1); node.appendChild(kid2); node.appendChild(kid3); const list = node.childNodes; list.forEach(function (currentValue, currentIndex, listObj) { console.log(`${currentValue}, ${currentIndex}, ${this}`); }, "myThisArg");
The above code results in the following:
[object HTMLParagraphElement], 0, myThisArg [object Text], 1, myThisArg [object HTMLSpanElement], 2, myThisArg
Specification |
---|
DOM Standard # interface-nodelist |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
forEach |
51 | 16 | 50 | No | 38 | 10 | 51 | 51 | 50 | 41 | 10 | 5.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach