JavaScript

Compare JavaScript vs TypeScript with simple examples of types, interfaces, functions, classes, errors, tooling and what to learn before Angular.

Learn the JavaScript skills you need before Angular, including functions, arrays, objects, modules, classes, Promises, async/await, APIs and TypeScript basics.

Build 12 JavaScript projects for beginners with step-by-step ideas, skills, starter code, practice goals and project order from easy to advanced.

Learn JavaScript debugging with console tools, browser DevTools, breakpoints, error messages, stack traces, DOM checks, Network tools and practical fixes.

Learn JavaScript localStorage with practical examples for setItem, getItem, removeItem, clear, JSON objects, arrays, cart data and common mistakes.

Learn the JavaScript Fetch API with practical GET and POST examples, JSON handling, response checks, errors, headers, FormData and async/await.

Learn JavaScript async and await with simple examples of Promises, try…catch, error handling, parallel requests and common beginner mistakes.

Learn JavaScript Promises with simple examples of pending, fulfilled and rejected states, then(), catch(), finally(), chaining and Promise.all().

Learn JSON in JavaScript with practical examples of JSON syntax, JSON.parse(), JSON.stringify(), arrays, objects, localStorage and API data.

Learn JavaScript form validation with practical examples for required fields, email, password, checkbox, custom errors and submit handling.