JavaScript is cross-platform and open-source. It is designed to create web applications and is very easy to understand and learn because it uses HTML.

JavaScript is the most popular client-side scripting language used for web applications. All browsers support JavaScriptand it is set as default. JIn addition, javascript provides full integration with CSS and HTML.

Why do we need to learn JavaScript?

JavaScript is a scripting language different from java and is used as a frontend language. JavaScript uses HTML and CSS, and most browsers implement JavaScript. JSP javascript can be used in-game, app, and desktop application development. JavaScript has many frameworks like react, jQuery, and Angular.

1) JavaScript: JavaScript is used to program the behavior of the web pages and what data we need to display to the user.
2) CSS: We used to specify the webpages' design or layout and how they will display to the user.
3) HTML: is used to define the content of the web pages. It displays the data which extracts from the business logic.

• It allows us to store our data in local storage for further use.
• We can also send a request to the server.
• It can also show the dynamic user contact depending on our business logic or requirement.
• It is also used for animation effects like sound and movement.
Finally,
• JavaScript provides us with various events depending on actions like keypresses, mouse click events, and pointer movement.

Applications of JavaScript

Presentations: JavaScript is used to create presentations that give our website an interactive look and make it user-friendly. JavaScript provides libraries to implement these presentations i.e., BespokeJS and RevealJS. We can use these libraries to build web-based presentations.
User Notifications: JavaScript is used to provide notifications to users. It provides us with dynamic notifications on the web pages.
Server Applications: JavaScript is an event-based library used to build scalable and fast applications.
Manipulating HTML: Using JavaScript, we can modify the HTML pages. Using JavaScript, we can easily delete or add any HTML tag depending upon the requirement, providing the look and feels of our application.
Client-side validation: JavaScript provides us with validated data at the client side only. So before submitting user input and sending them to the server side, we can pre-validate our data using JavaScript libraries.
Back-end Data Loading: In JavaScript, we use ajax calls to load data from the backend. This can be done while we are doing some other task or any other data processing.

Example

Code:

<!DOCTYPE html>
<html>
<body>
<h2> Javascript demo program </h2>
<button type="button"
onclick="document.getElementById('demo1').innerHTML = Date()">
Press me! I will display the current date and time.</button>
<p id="demo1"></p>
</body>
</html>

Output:

Prerequisites

Any programmer with a basic understanding of HTML and CSS with added advantage if they have some knowledge of the object-oriented programming language.

Target Audience

We have created this article for beginners to make them understand how to create dynamic web pages.