JavaScript Tutorial

The language for programming web pages.

Chapter Quiz Exercises
Course Topics
JS Introduction JS Where To JS Output JS Variables JS Data Types JS Functions JS Objects JS Arrays JS Strings JS If Conditions JS Loops JS Math JS Errors JS Scope JS DOM JS Events JS Promises & Async JS Classes JS JSON JS RegExp

JS Introduction

What is JavaScript?

JavaScript is the worlds most popular programming language. JavaScript is the programming language of the Web. JavaScript is easy to learn. It can update and change both HTML and CSS, and can calculate, manipulate, and validate data.

What can JavaScript do?

  • Change HTML content dynamically
  • Change HTML attribute values
  • Change HTML styles (CSS)
  • Hide/Show HTML elements
  • Handle user events (click, hover, etc.)
  • Validate form data
  • Make HTTP requests (AJAX/Fetch)
  • Build entire web applications

Try It Yourself

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Topics
JS Introduction JS Where To JS Output JS Variables JS Data Types JS Functions JS Objects JS Arrays JS Strings JS If Conditions JS Loops JS Math JS Errors JS Scope JS DOM JS Events JS Promises & Async JS Classes JS JSON JS RegExp