onclick function in Javascript- full guide 2022

Hey readers, in this article, we will be covering all the onclick events in JS and how to use the onclick events in JavaScript. Before jumping directly to the onclick event in JS, we will learn about JavaScript and the basics of what exactly an event is in this context. So if you are new to all these concepts, don’t worry, we will be covering it right from the fundamentals and will then move to differences. So keep reading.

Introduction

JavaScript is one of the most used languages when it comes to building web applications as it allows developers to wrap HTML and CSS code in it to make web apps interactive. It enables the interaction of users with the web application. It is also used for making animations on websites and has a large community on GitHub. JavaScript has tons of libraries, one of which is React which we will be covering in this article later.

Use cases of JS:

Building web server and its interactive functions in web application
Animations and graphics, adding special effects to web components in the web application
Validating forms and exception errors in it
Adding behavior and functionalities to web pages

In JavaScript, promises are used to handle asynchronous operations. When dealing with several asynchronous activities, where callbacks might cause callback hell and unmanageable code, they are simple to manage.

Important points to remember in JavaScript

It is a scripting language
It has unstructured code
It is a programming language
It is used both client-side and server-side to make web apps interactive
It is built and maintained by Brendan Eich and the team
Uses built-in browser DOM
Extension of JavaScript file is .js

onclick Event

When a button is clicked, run the following JavaScript: The onclick event occurs when the user clicks on an element. In HTML: <element onclick=”myScript”> In JavaScript: object.

<!DOCTYPE html>
<html>
<body>

<h1>HTML DOM Events</h1>
<h2>The onclick Event</h2>

<p>The onclick event triggers a function when an element is clicked on.</p>
<p>Click to trigger a function that will output "Hello Codedamn":</p>

<button onclick="myFunction()">Click me</button>

<p id="demo"></p>

<script>
function myFunction() {
  document.getElementById("demo").innerHTML = "Hello World";
}
</script>

</body>
</html>
Code language: HTML, XML (xml)

Usage and Definition

When a user clicks on an element, the onclick event is triggered.

<!DOCTYPE html>
<html>
<body>

<h1>HTML DOM Events</h1>
<h2>The onclick Event</h2>

<p>Use the HTML DOM to assign an "onclick" event to a p element:</p>

<p id="demo">Click me.</p>

<script>
document.getElementById("demo").onclick = function() {myFunction()};

function myFunction() {
  document.getElementById("demo").innerHTML = "YOU CLICKED ME!";
}
</script>

</body>
</html>
Code language: HTML, XML (xml)

Conclusion

This is how onclick in JavaScript is used. If you have any feedback, do drop a text in the comment section.

If you have any query related to React or JavaScript, do drop it down in the comment section also do check out codedamn courses if you want to learn more about JavaScript and React with its use cases and amazing projects. They also have an in-built playground for different programming languages and environment sets so do check that out and join codedamn’s community!

Hope you like it.

Introduction

onclick Event

Usage and Definition

Conclusion

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