JavaScript is a powerful scripting language that runs in the browser, allowing us to manipulate the content and behavior of the web page. When likening it to a house, JavaScript functions as the house's functionality, encompassing elements like electrical systems, plumbing, home automation, and central heating - essentially, anything that provides functionality.

Here's how we can add JavaScript to the HTML document:

Inline JavaScript

We can include JavaScript directly within the HTML document using the <script> tag. This method is useful for adding quick, one-off scripts.

Example:

Please click the Click Me button below.

External JavaScript

For larger scripts or when we want to reuse code across multiple pages, it's common to use external JavaScript files. Create a separate JavaScript file (e.g., index.js) and link it to the HTML document using the <script> tag.

Example:

Please make sure to review all three files in the example provided.

JavaScript Basics

JavaScript allows us to add interactivity and dynamic behavior to the web pages. Here are some basic concepts:

Variables

Variables are used to store data values. We can declare variables using the let or const keywords.

Functions

Functions are reusable blocks of code that perform a specific task. We can define functions using the function keyword.

DOM Manipulation

The Document Object Model (DOM) represents the structure of a web page. JavaScript allows us to manipulate the DOM to change the content and behavior of the web page dynamically.

Conditional Statements

Conditional statements allow us to execute different code blocks based on specified conditions.

Video Tutorial