Master JavaScript from basics to advanced
A complete guide to the JavaScript event loop architecture. Covers the call stack, task queue, microtask queue, how setTimeout and Promises are scheduled, requestAnimationFrame timing, event loop phases in Node.js, blocking the main thread, and real-world performance implications.
A complete guide to browser Web APIs in JavaScript. Covers the DOM API, Fetch API, Web Storage, Geolocation, Intersection Observer, Resize Observer, Clipboard API, Notifications API, URL and URLSearchParams, and how Web APIs bridge JavaScript with browser capabilities.
A complete tutorial on the JavaScript Fetch API. Covers GET and POST requests, response handling, JSON parsing, headers configuration, error handling, AbortController for cancellation, query parameters, timeout patterns, and migrating from XMLHttpRequest to fetch.
A complete guide to handling POST requests with the JavaScript Fetch API. Covers JSON payloads, form data, file uploads with FormData, setting headers, reading responses, error handling for POST requests, CSRF tokens, and building reusable POST helpers for common API patterns.
A complete guide to uploading files via the JavaScript Fetch API. Covers FormData construction, single and multiple file uploads, drag-and-drop integration, upload progress tracking, chunked uploads for large files, validation before upload, and server-side handling expectations.
A complete tutorial on building a dynamic JavaScript portfolio website. Covers project structure, responsive design with CSS Grid and Flexbox, animated project cards, dark/light theme toggle, contact form with Fetch API submission, SEO metadata, performance optimization, and deploying to a custom domain.
A complete guide to using Axios for HTTP requests in JavaScript. Covers installation, GET and POST requests, automatic JSON transforms, error handling differences from Fetch, creating instances with defaults, cancellation with AbortController, timeout configuration, and a full comparison table between Axios and Fetch.
A complete guide to Axios interceptors in JavaScript. Covers request interceptors for auth token injection and logging, response interceptors for error handling and token refresh, interceptor execution order, ejecting interceptors, and practical patterns including retry logic, loading indicators, error normalization, and request caching.
A complete guide to advanced API error handling in JavaScript. Covers custom error classes, structured error responses, HTTP status code mapping, retry-safe vs non-retry-safe errors, global error boundaries, centralized error logging, graceful degradation, circuit breaker pattern, and user-friendly error messages.
A complete tutorial on debouncing in JavaScript. Covers how debouncing works, implementing a debounce function from scratch, leading vs trailing execution, cancellation, the timing diagram, real-world use cases like search input and window resize, and common pitfalls with event handlers in loops.
A complete guide to building a search bar with JavaScript debouncing. Covers a debounced input handler, live search with Fetch API, highlighting matched text, keyboard navigation through results, loading and empty states, AbortController for canceling stale requests, accessibility with ARIA attributes, and mobile-responsive styling.
A complete tutorial on throttling in JavaScript. Covers how throttling works, building a throttle function from scratch, leading and trailing edge execution, timestamp-based vs timer-based implementations, real-world use cases like scroll tracking and mousemove handlers, throttle vs debounce comparison, and requestAnimationFrame as a visual throttle.