1.6 - JavaScript

JavaScript is a popular programming language used to create dynamic and interactive web pages. It was developed by Brendan Eich at Netscape in 1995 and has since become an essential part of web development.

Features

JavaScript is known for its versatility and ability to run on both the client and server side. Some of the standout features of JavaScript include:

1. Object-Oriented Programming: JavaScript is primarily an object-oriented language, which allows developers to create reusable code and organize it into easy-to-manage objects.

2. Asynchronous Programming: JavaScript allows for asynchronous programming, which means that tasks can be executed in the background and without blocking the main program flow. This makes it easier to create responsive and interactive web applications.

3. Built-in Functions: JavaScript has a wide range of built-in functions that make it easy to manipulate data, work with dates and times, and perform mathematical calculations.

Usage

JavaScript is used primarily for frontend web development, but it can also be used for backend applications and mobile app development. It is commonly used in conjunction with HTML and CSS to create dynamic and interactive user interfaces.

Here's an example of how JavaScript can be used to change the color of a button when it is clicked:

const button = document.querySelector('button');

button.addEventListener('click', () => {
  button.style.backgroundColor = 'red';
});

In this code snippet, we first select the button element using the querySelector method. We then add an event listener to the button that changes its background color to red when it is clicked.

Conclusion

JavaScript is an essential tool for web development, and its versatility and ease of use make it a popular choice among developers. Whether you're creating a simple webpage or a complex web application, JavaScript can help you create a more dynamic and engaging user experience.