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Web Development

JavaScript Essentials

JavaScript is the language that makes web pages respond, update, and come alive. Starting from your first variable, you will work up to handling clicks, validating forms, and loading real data from an API. Each concept is practised in the browser as you learn it, so you finish with working interactive pages, not just theory. This course follows HTML & CSS Foundations in the Frontend Developer roadmap.

Beginner · 14 lessons · 9 hours · English · Part of the Frontend Developer Roadmap

JavaScript Essentials course cover artwork

What you will learn

  • Use variables, data types, and operators in JavaScript
  • Make decisions and loops with conditionals and iteration
  • Write and reuse functions, arrays, and objects
  • Select and change page elements with the DOM
  • Handle clicks, form input, and validation with events
  • Fetch and display data from a public API

Curriculum

Module 1: JavaScript Fundamentals
  • Your First Script: Variables and Data TypesFree preview11 min
  • Operators and Conditionals12 min
  • Loops: Repeating Work the Smart Way11 min
  • Functions: Writing Reusable Code13 min
  • Module Quiz: JavaScript FundamentalsQuiz
Module 2: Working with Data
  • Arrays and Common Array Methods13 min
  • Objects and JSON11 min
  • Reading: How to Read Error Messages and Debug7 min
  • Module Quiz: Arrays and ObjectsQuiz
Module 3: JavaScript in the Browser
  • The DOM: Selecting and Changing Elements13 min
  • Events and Form Validation12 min
  • Fetching Data from an API with fetch()14 min
  • Building a Small Interactive App Step by Step14 min
  • Module Quiz: DOM, Events and APIsQuiz

Project: Build a Weather App Using a Public API — you finish this course by building it, not just by watching.

Requirements

  • Basic HTML and CSS (the HTML & CSS Foundations course or equivalent)
  • A computer with a modern web browser
  • A free code editor such as VS Code

Frequently asked questions

Is JavaScript Essentials really free?

Yes. This course is free and open. Its lessons use public learning videos with FUTEAC summaries, tasks and quizzes. An optional verified certificate is available after completion.

Do I get a certificate?

You receive a completion record when you finish the course and pass its quizzes. A verifiable certificate with a public verification link is available as an optional upgrade.

What do I need before starting?

Check the Requirements section on this page. If a course builds on an earlier one, we say so there — and the roadmap shows you the right order.

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