Yarn Global Command Not Working? Fix 'create-react-app: command not found' in Yarn v0.16.1
If you’ve ever tried to use `create-react-app` after installing it globally with Yarn v0.16.1, you might have encountered the frustrating error:...
Posts for 2026-08
Posts published in this month
Yarn ERROR: 'There are no scenarios; must have at least one' – Why It Happens (v0.32) & How to Fix It
If you’ve spent any time working with JavaScript or Node.js, you’re likely familiar with **Yarn**—the popular package manager designed to be faster, more...
Yarn Command Not Found After Installing via npm: Fix for Ubuntu 20.04 [Troubleshooting Guide]
If you’ve recently tried to install Yarn (a popular JavaScript package manager) via `npm` on Ubuntu 20.04, only to be greeted with the frustrating `yarn:...
XMLHttpRequest.upload.onprogress Not Working Over HTTPS? (Works on HTTP) – Troubleshooting & Fixes
If you’ve ever built a file upload feature with JavaScript, you’re likely familiar with `XMLHttpRequest.upload.onprogress`—the event that lets you track upload...
How to Submit HTML Forms Asynchronously with XMLHttpRequest: Retrieving Form Data Without Page Refresh
Submitting forms is a core part of web interaction—whether it’s a contact form, login screen, or feedback form. Traditionally, form submission involves sending...
XMLHttpRequest Multipart/Related POST: How to Send XML and Image Payload to Picasa Webalbums from Chrome Extension
In today’s interconnected world, browser extensions often need to interact with external APIs to enhance functionality. A common use case is uploading media...
XMLHttpRequest Deprecated? Best Pure JavaScript Alternatives to Check Valid Image URLs
As web developers, validating image URLs is a common task—whether you’re handling user-uploaded content, integrating external APIs, or dynamically loading...
Why XMLHttpRequest POST Changes to OPTIONS: Understanding CORS Preflight Requests
If you’ve ever used `XMLHttpRequest` (XHR) to send a `POST` request from a web app, you might have noticed a puzzling behavior in your browser’s network tab:...
XMLHttpRequest Cannot Load: Fixing 'No Access-Control-Allow-Origin' Header Error in Express.js (Localhost)
If you’ve ever built a web application with a frontend (e.g., vanilla JavaScript, React, Vue) and a backend API using Express.js, you’ve likely encountered the...
XMLHttpRequest & Set-Cookie: Troubleshooting Why Cookies Aren't Being Set After Digest Authentication (And How to Fix It)
If you’ve ever used `XMLHttpRequest` (XHR) to make HTTP requests and struggled to get cookies set after implementing Digest Authentication, you’re not alone....