JavaScript Basics

📘JS Basics Beginner

JavaScript is a versatile programming language that powers the interactive web. Let’s start with the fundamentals.

What is JavaScript?

JavaScript is a high-level, interpreted programming language that runs in web browsers and on servers (via Node.js).

// Your first JavaScript code
console.log("Hello, World!");

Where JavaScript Runs

1. In browsers for client-side scripting
2. On Node.js for server-side applications
3. With Electron for desktop applications
4. With React Native for mobile applications

Adding JavaScript to HTML

Inline Script

<script>
  console.log("Hello from inline script!");
</script>

External File

<script src="app.js"></script>

Comments

// Single-line comment

/*
  Multi-line
  comment
*/

Console Methods

console.log("Regular message");
console.warn("Warning message");
console.error("Error message");
console.table({ name: "John", age: 30 });

Next Steps

Now that you understand the basics, move on to Variables to learn about data storage in JavaScript.