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Modern JavaScript: The Complete Guide (ES2023, DOM, Async)

Master modern JavaScript from variables to the event loop, DOM projects, fetch and ES modules

Ghosla Academy · Web Team

JavaScript powers almost every website and is the gateway to React, Node.js and full-stack jobs. This course teaches the modern language properly, including features added up to ES2023, with runnable examples and clear explanations of tricky topics like closures and the event loop. You will build two projects in the browser, a quiz app and a GitHub profile finder, and leave ready to learn any framework with confidence.

What you will be able to do

  • Explain how JavaScript runs in browsers and Node.js
  • Write clean code with let/const, functions, closures and modern operators
  • Transform data with array methods, destructuring, spread and ES2023 features
  • Build interactive pages with the DOM, events and event delegation
  • Handle asynchronous code with promises, async/await and fetch
  • Organise code with classes and ES modules and use npm

What you build

  • Interactive quiz app with score tracking
  • GitHub profile finder using the fetch API

What you need to start

  • Basic HTML and CSS familiarity helps
  • A laptop with a modern browser and VS Code

Curriculum · 6 sections, 24 lectures

JavaScript foundations3 lectures
  1. How JavaScript runs: browsers, Node and enginesFree preview8 min
  2. Values, variables and typesFree preview12 min
  3. Quiz: foundations5 min
Control flow and functions4 lectures
  1. Operators, conditionals and loops14 min
  2. Functions, arrow functions and default parameters14 min
  3. Scope, hoisting and closures15 min
  4. Quiz: functions5 min
Working with data5 lectures
  1. Array methods: map, filter, reduce, find15 min
  2. Objects, destructuring and spread14 min
  3. Modern ES2023 features: optional chaining, at(), toSorted()12 min
  4. JSON, Map and Set cheat sheet8 min
  5. Quiz: data6 min
The DOM and events4 lectures
  1. Selecting and updating the DOM14 min
  2. Events, forms and event delegation15 min
  3. Project: interactive quiz app20 min
  4. Quiz: DOM5 min
Asynchronous JavaScript5 lectures
  1. The event loop explained12 min
  2. Promises and async/await15 min
  3. Fetch API and error handling14 min
  4. Project: GitHub profile finder20 min
  5. Quiz: async JavaScript6 min
Classes, modules and tooling3 lectures
  1. Classes and prototypes14 min
  2. ES modules and npm basics12 min
  3. Final quiz: modern JavaScript6 min

Who this is for

  • Students starting web development
  • Self-taught learners who want to fill gaps in JavaScript
  • Freshers preparing for frontend interviews