NodeList objects are the collection of nodes, usually returned by properties such as Node.childNodes and methods such as document.querySelectorAll(). Although NodeList is not an actual Array but it is possible to iterate over it with the help of forEach() method. NodeList can also be converted into actual array by following methods.
Method 1: By using Array.prototype.slice.call() method.
Syntax:
const array = Array.prototype.slice.call(nodeList); // Normal Method const array = [].slice.call(nodeList); // Condensed Method
Example:
<body>
<p>Hello geeks 1</p>
<p>Hello geeks 2</p>
<p>Hello geeks 3</p>
<p>Hello geeks 4</p>
<script>
// This is nodeList
const nodeList = document.querySelectorAll('p');
console.log(nodeList);
// Converting using Array.prototype.slice.call
const array1 = Array.prototype.slice.call(nodeList);
console.log(array1);
</script>
</body>
|
Output:
Method 2: With the help of Array.from() method.
Syntax:
const array = Array.from(nodeList);
Example:
<body>
<p>Hello geeks 1</p>
<p>Hello geeks 2</p>
<p>Hello geeks 3</p>
<p>Hello geeks 4</p>
<script>
// This is nodeList
const nodeList = document.querySelectorAll('p');
console.log(nodeList);
// Converting to array using Array.from() method
const array = Array.from(nodeList);
console.log(array);
</script>
</body>
|
Output:
Method 3: Using ES6 spread syntax, it allows an iterable such as an array expression or string to be expanded in places where zero or more arguments or elements are expected.
Syntax:
const array = [ ...nodeList ]
Example:
<body>
<p>Hello geeks 1</p>
<p>Hello geeks 2</p>
<p>Hello geeks 3</p>
<p>Hello geeks 4</p>
<script>
// This is nodeList
const nodeList = document.querySelectorAll('p');
console.log(nodeList);
// Converting using Spread syntax
const array1 = [...nodeList];
console.log(array1);
</script>
</body>
|
Output:
Note: Method 2 and Method 3 may not work in older browsers properly but will work fine in all modern browsers.