The forEach() method of the NodeList interface calls the callback given in parameter once for each value pair in the list, in insertion order.
Syntax:
NodeList.forEach(callback, currentValue);
Parameters:
- Callback: A function to execute on each element of NodeList. It accepts 3 parameters:
- currentValue: The current element to be processed in NodeList.
- currentIndex (Optional): The index of the currentValue being processed in NodeList.
- listobj (Optional): The NodeList on which forEach() is being applied.
- thisArg (Optional): Value to use as this when executing callback.
Return value: This method returns undefined.
Example: In this example, we will create a NodeList and hence will get all values from NodeList using this method.
html
<!DOCTYPE HTML> <html>
<head>
<meta charset="UTF-8">
<title>HTML | DOM NodeList.forEach() Method</title>
</head>
<body style="text-align:center;">
<h1 style="color:green;">
GeeksforGeeks
</h1>
<p>
HTML | DOM NodeList.forEach() Method </p>
<button onclick = "Geeks()">
Click Here
</button>
<p id="a"></p>
<script>
var a = document.getElementById("a");
a.innerHTML = "elements are : "
function Geeks(){
var parentNode = document.createElement("div");
var c1 = document.createElement("p");
var c2 = document.createElement("span");
var c3 = document.createElement("h1");
parentNode.appendChild(c1);
parentNode.appendChild(c2);
parentNode.appendChild(c3);
var nodelist = parentNode.childNodes;
nodelist.forEach(
function(currentValue, currentIndex, listObj) {
a.innerHTML += "<li>"+currentValue.localName + `</li>`;
console.log(currentValue, currentIndex);
},
);
}</script>
</body>
</html>
|
Output:
Before Clicking Button:
After Clicking Button: Elements are called using forEach().
In the console: Element Values can be seen.
Supported Browsers:
- Google Chrome 51 and above
- Edge 16 and above
- Firefox 50 and above
- Safari 10 and above
- Opera 38 and above
- Internet Explorer Not Supported