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JavaScript Fundamentals

JavaScript is the language of the web. Master it and you can build anything.

Learning Objectives​

  • Write modern ES6+ JavaScript with confidence
  • Understand the event loop, closures, and prototypes
  • Work with the DOM, events, and browser APIs
  • Use modules and modern tooling (bundlers, linters)

Key Topics​

Modern Syntax​

Arrow functions, destructuring, template literals, optional chaining, and nullish coalescing. Write cleaner, more expressive code.

Async JavaScript​

Promises, async/await, and the Fetch API. Handle asynchronous operations without callback hell.

DOM Manipulation​

Select elements, handle events, and update the page dynamically. Understand when vanilla JS is enough and when a framework helps.

Exercise​

Build an interactive todo app using vanilla JavaScript. It should support adding, completing, filtering, and deleting items — all without a framework.