nextsibling vs nextelementsibling
NextSibling vs NextElementSibling
As a web developer, I have often come across the terms nextSibling
and nextElementSibling
while working with JavaScript. Both of these properties are used to navigate to the next sibling element of a given element in the DOM tree. However, there is a major difference between them.
The nextSibling Property
The nextSibling
property returns the next sibling node (including text nodes) of the current element in the DOM tree. Let me give you an example:
// HTML code
<div id="parent">
<p>First child</p>
<span>Second child</span>
<ul>
<li>Third child</li>
<li>Fourth child</li>
</ul>
</div>
// JavaScript code
let secondChild = document.getElementById('parent').firstChild.nextSibling;
console.log(secondChild); // Output: #text
let thirdChild = secondChild.nextSibling.nextSibling;
console.log(thirdChild); // Output: <ul>...</ul>
In the above example, the nextSibling
property is used to navigate from the first child element to the second child element, which is a text node. Then, it is used again to navigate to the third child element, which is an unordered list (<ul>
) node.
The nextElementSibling Property
The nextElementSibling
property, on the other hand, returns the next sibling element node (excluding text nodes) of the current element in the DOM tree. Here's an example:
// HTML code
<div id="parent">
<p>First child</p>
<span>Second child</span>
<ul>
<li>Third child</li>
<li>Fourth child</li>
</ul>
</div>
// JavaScript code
let secondChild = document.getElementById('parent').firstElementChild.nextElementSibling;
console.log(secondChild); // Output: <span>...</span>
let thirdChild = secondChild.nextElementSibling;
console.log(thirdChild); // Output: <ul>...</ul>
In the above example, the nextElementSibling
property is used to navigate from the first child element to the second child element, which is a <span>
node. Then, it is used again to navigate to the third child element, which is an <ul>
node.
It is important to note that if there are no more element nodes after the current element, both properties will return null
.
In summary, while nextSibling
returns any type of node (including text nodes), nextElementSibling
returns only element nodes. Therefore, it is recommended to use nextElementSibling
when you want to navigate to the next element node in the DOM tree.