Javascript get element by class

Javascript get element by class:

In JavaScript, you can retrieve HTML elements by their class name using various methods provided by the Document Object Model (DOM) API. This allows you to access and manipulate specific elements on a web page that share the same CSS class.

Example of Getting Elements by Class in JavaScript: 

Here’s a simple example of how to get elements by their class in JavaScript:

<!DOCTYPE html>
<title>Getting Elements by Class</title>
<h1 class="header">Welcome to My Website</h1>
<p class="content">This is some content.</p>
<p class="content">More content here.</p>
// Get elements by class name
var contentElements = document.getElementsByClassName(“content”);
// Loop through the elements and change their text
for (var i = 0; i < contentElements.length; i++) {
contentElements[i].textContent = “Updated content”;

Implementation of Getting Elements by Class in JavaScript:

In the example above:

  1. We have an HTML document with three elements: an <h1> element with the class “header” and two <p> elements with the class “content.”
  2. In the JavaScript code within the <script> tag, we use the document.getElementsByClassName("content") method to retrieve all elements with the class “content.” This method returns an HTMLCollection of elements.
  3. We then loop through the HTMLCollection using a for loop and update the textContent property of each element to “Updated content.” This changes the text content of all elements with the class “content.”

Other Ways to Get Elements by Class:

  1. Using querySelectorAll: Instead of getElementsByClassName, you can use the more versatile querySelectorAll method to select elements by CSS selectors, including class names. This method returns a NodeList.
var contentElements = document.querySelectorAll(".content");
  1. Using Modern JavaScript with ES6: If you are working with modern JavaScript (ES6+), you can use the Array.from method or the spread operator to convert a NodeList or HTMLCollection into an array for easier manipulation.
// Using Array.from
var contentElementsArray = Array.from(document.querySelectorAll(".content"));
// Using the spread operator
var contentElementsArray = […document.querySelectorAll(“.content”)];
  1. Using jQuery (Library): If you prefer a more concise and cross-browser solution, you can use jQuery, a popular JavaScript library, to select elements by class.
// Include jQuery library in your HTML file first
var contentElements = $(".content");

These are some common methods to get elements by class in JavaScript. The choice of method depends on your specific project requirements and whether you are using plain JavaScript or a library like jQuery.

About the author

Pretium lorem primis senectus habitasse lectus donec ultricies tortor adipiscing fusce morbi volutpat pellentesque consectetur risus molestie curae malesuada. Dignissim lacus convallis massa mauris enim mattis magnis senectus montes mollis phasellus.

3 thoughts on “Javascript get element by class”

  1. You are truly an accomplished webmaster. The site loads in an astounding amount of time; it almost seems as though you’re accomplishing something special. Furthermore, the contents are flawless; you’ve done an outstanding job with this.

  2. This website page is unbelievable. The radiant substance reveals the moderator’s excitement. I’m awestruck and expect additional such astounding posts.

  3. Hello Neat post Theres an issue together with your site in internet explorer would check this IE still is the marketplace chief and a large element of other folks will leave out your magnificent writing due to this problem


Leave a Comment