Provides JavaScript enthusiasts with tutorials and experience sharing on web front‑end technologies, including JavaScript, Node.js, Deno, Vue.js, React, Angular, HTML5, CSS3, and more.
Storing JWT tokens in localStorage has become a serious security risk because XSS attacks can steal them, so developers should adopt safer alternatives such as HttpOnly cookies, BFF‑backed sessions, or Service Worker‑based in‑memory storage, each with its own trade‑offs.
The article outlines seven browser‑based techniques—including requestAnimationFrame, setInterval, requestIdleCallback, Web Workers, Promise + async/await, the Web Animations API, and Intersection Observer—each offering higher accuracy, better resource handling, or smoother execution than the traditional setTimeout timer.
Web Workers let JavaScript run heavy computations in background threads, freeing the main UI thread, boosting multi‑core utilization, and improving memory management, which together dramatically enhance front‑end performance for tasks like data processing, image filtering, media handling, and AI inference.
This article explains the background and security concerns behind the deprecation of the JavaScript document.domain API, details browser warnings, and provides a step‑by‑step migration guide using postMessage, Channel Messaging, and proper CORS configuration to keep web applications functional.
While Promise.all is the traditional way to run multiple asynchronous operations in JavaScript, it aborts the whole batch when any promise rejects, making it impossible to know which calls succeeded; Promise.allSettled overcomes this by waiting for all promises and providing a detailed status for each result.
This guide explains how to detect when a user leaves a web page using modern APIs like Page Visibility, beforeunload/unload, sendBeacon, and pagehide, compares their advantages and drawbacks, provides code snippets, and offers practical recommendations for reliable data reporting and UI handling.
This article explains why async/await can introduce performance overhead, then presents four optimized Promise‑based patterns—including chain optimization, Promise.all parallelism, batch processing, and pooling—that can improve JavaScript asynchronous code speed by up to 80% in high‑frequency or large‑scale scenarios.
This article examines why traditional JavaScript for loops are often suboptimal and introduces more readable, functional, and powerful alternatives such as array methods, for...of, for...in, and the spread operator, while also outlining scenarios where the classic for loop still shines.
This article examines the security, performance, capacity, and query limitations of localStorage, explains how IndexedDB addresses each issue with asynchronous APIs, larger storage, stronger security, and advanced indexing, and introduces helper libraries that simplify its use.
The article explains how modern CSS is shifting from fixed pixel and rem units to viewport‑based vw and the clamp() function, offering truly fluid, boundary‑controlled layouts that scale smoothly across any screen size while preserving accessibility where needed.
