Js-News

Have you ever been in this situation: your Node.js server is getting slower and slower, users are complaining about page lag, but you don’t want to undertake a massive rewrite of your entire project? Don’t panic! Today I’m sharing a “lazy but effective” optimization approach—middleware refactoring. Using this method, my server performance improved by 40%, and the code became cleaner too. What is Middleware? Let’s Get This Concept Clear First Simply put, middleware is like a restaurant server. You order a dish (make a request), the kitchen prepares it (processing logic), but before the dish reaches your table, the server has to do many things: ...

Stop Using substr(): Why It Breaks, What To Use Instead Short answer: avoid substr(). It is deprecated in the standard and may be removed in the future. Prefer slice() in almost all cases (use substring() only when its specific behavior is required). Details and a migration checklist below. Why was substr() deprecated? String exposes three ways to cut text: slice(start, end) substring(start, end) substr(start, length) The first two follow the “start–end” convention. Only substr() takes a length, which makes the mental model inconsistent and increases bugs during quick editing and code reviews. Standards bodies and browser vendors discourage it and have marked it as deprecated. ...

HTML Speculation Rules API: 6 Lines of Code for Instant Page Loads Summary: This comprehensive guide explores the HTML5 Speculation Rules API, demonstrating how 6 lines of HTML code can achieve 90% faster page loads through intelligent prefetching and prerendering. Includes complete Chrome 121+ implementation and cross-browser compatibility solutions. Have you ever experienced that magical moment when clicking a link on a website, and the page appears instantly with zero loading time? It’s like teleportation rather than traditional page navigation. ...