When Clicked Javascript

Javascript Programming

When I first started learning JavaScript, one of the most exciting concepts I came across was the ability to trigger actions when an element is clicked. This feature, known as the “onclick” event, allowed me to add interactivity and dynamic behavior to my web pages. In this article, I will dive deep into the world of “when clicked” JavaScript events and share my personal experiences and insights.

Understanding the “onclick” Event

The “onclick” event is a JavaScript event handler that is used to execute a piece of code when an element is clicked by the user. It can be applied to various HTML elements such as buttons, links, images, and even entire sections of a webpage.

For example, let’s say you have a button on your webpage with the id “myButton”. You can use JavaScript to listen for a click event on this button and perform a specific action when it is clicked.

const button = document.getElementById("myButton");

button.onclick = function() {
// Code to be executed when the button is clicked
console.log("Button clicked!");

Here, I have assigned a function to the “onclick” event of the button. Whenever the button is clicked, the code inside the function will be executed. In this case, it simply logs a message to the console.

Adding Interactivity with “onclick”

The “onclick” event opens up a world of possibilities for adding interactivity to your web pages. You can use it to show or hide elements, change the content of a webpage, submit forms, make API calls, and much more.

One practical example where the “onclick” event comes in handy is implementing a toggle functionality. Let’s say you have a FAQ section on your website, and you want to show or hide the answer when a question is clicked. You can achieve this by using the “onclick” event along with some JavaScript code:

const question = document.getElementById("question");
const answer = document.getElementById("answer");

question.onclick = function() {
if (answer.style.display === "none") {
answer.style.display = "block";
} else {
answer.style.display = "none";

In this example, when the question element is clicked, the code checks the current display property of the answer element. If it is set to “none”, the code changes it to “block” to show the answer. If it is already visible, the code sets it back to “none” to hide the answer.

Personal Touch: My Favorite “when clicked” Functionality

One of my favorite use cases for the “onclick” event is creating a dynamic image gallery. Imagine you have a collection of images, and you want to showcase them one by one when the user clicks on a thumbnail. By utilizing the “onclick” event, you can easily achieve this interactive image gallery:

const thumbnails = document.getElementsByClassName("thumbnail");
const mainImage = document.getElementById("mainImage");

for (let i = 0; i < thumbnails.length; i++) { thumbnails[i].onclick = function() { mainImage.src = thumbnails[i].src; }; }

In this example, I have a set of thumbnail images represented by the "thumbnail" class. When any of these thumbnails are clicked, the code updates the source of the mainImage element to the clicked thumbnail's source, effectively changing the displayed image.


The "onclick" event in JavaScript is a powerful tool that allows you to add interactivity and responsiveness to your web pages. By listening for click events on various elements, you can perform actions and create dynamic user experiences. Whether it's showing or hiding elements, toggling functionality, or building interactive image galleries, the possibilities are endless.

So, next time you want to add an engaging "when clicked" functionality to your web page, remember to harness the power of JavaScript's "onclick" event!