DOM traversal method is a method in which we can call any parent node and child without class or id. The DOM traversal method is an easy and simple way to call any parent or child node/element. The DOM traversing method is also called Waling of DOM.
DOM Traversing Method in JavaScript
Dom traversing method is an easy method to get any parent node or child node. It is considered an important method and easy javascript method.
To become a senior javascript developer we also need a best practice of javascript dom traversing methods. To become an expert in javascript development you must need to know what is javascript and why we use javascript.
JavaScript is a scripting-based programming language that helps to make web page dynamic. If you want to know what is javascascript must read What is JavaScript?
The Javascript dom traversal method converts our complex code situation easily and simply. The code we write with the help of the dom traversing method is simple, short, and readable.
If you are a student or junior javascript developer and want to expert in the javascript dom traversal method then don't worry this article is for you.
In this article, I will show you the all method of javascript dom traversing. After reading this article you will be an expert in javascript dom traversal methods.
JavaScrpt DOM Traversing Method
There are many javascript DOM traversing methods. Below is a list of javascript dom traversing methods.
- parentNode & parentElement DOM Traversing Method
- firstChild & lastChild DOM Traversing Method
- first element child & lastElementChild DOM Traversing Method
- nextSiblings DOM Traversing Method
- previousSiblings & previousSiblings DOM Traversing Method
- nextElementSiblings DOM Traversing Method
- lastElementSiblings DOM Traversing Method
Description
parentNode & parentElement DOM Traversing Method
DOM parentNode and parentElement methods are the first main method of javascript DOM traversing. These two methods are considered the main method of DOM traversing.
The main difference between the parentNode and parentElement is, in the parentElement method if there is no parent class then the compiler shows the null value but in the parentNode method compiler always shows some result. In the parentNode method, the result can not be a null value. parentNode also shows the all-child or parent class.
In the parentElement method, we can get the parent element by calling the child of the parent element. It is an easy way to get and set the value of the parent element of any child class. The parent class can also be a child class of any other class or id. Below is a code example of the DOM parentElement traversing method.
<div class="nws-parent">
<h1>Heading</h1>
<div id="nws-parent-inner">
<p>CodingPea</p>
<p>CodingPea</p>
<p class="nws-class">CodingPea</p>
<p>CodingPea</p>
<p>CodingPea</p>
</div>
</div>
<script>
var variableName = document.getElementById("nws-parent-inner").parentElement;
console.log(variableName);
</script>
In the above code example, the class="nws-parent" have a child class named "nws-parent-inner". We get the parent class of "nws-parent-inner" and show the result in the console.
firstChild & lastChild DOM Traversing Method
firstChild & lastChild DOM Traversing Method is the second main method of DOM Traversing. With the help of this method, we can get the first child html and the last child html.
The main difference between these two methods is in the firstChild DOM method we can get the first element html and in the lastChil DOM method, we can get the last child element html. We can not give any CSS style through these two methods.
firstElementChild & lastElementChild DOM Travering Method
These two methods are the same as about two methods. The main difference between the above method and this method is in this method we can get the last or first element tag.
After getting the first element child or last element child we can add any CSS style in our javascript code.
nextSiblings & previous siblings DOM Traversing Method
nextSiblings & previousSiblingsTraversing Method is an important and easy method in JavaScript. Siblings is an English word which means the items or child whose parent class is one. This means we have a multiple-child class and one parent class, we can call all child are siblings.
We can just select and next and previous element HTML with the help of this method. If the next or previousSiblings does not exist then the compiler shows the error null.
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