Embedding UPI QR Codes in PDF Invoices with qr-code-styling and pdf-lib in Next.js
The Problem Our invoice generator already used pdf-lib to generate PDFs client-side and qr-code-styling for QR generation elsewhere in the
Curated development tutorials from top sources. Filter by language.
The Problem Our invoice generator already used pdf-lib to generate PDFs client-side and qr-code-styling for QR generation elsewhere in the
Your application fetches a URL. The user supplied it. Your server makes the request, follows the redirect, and returns the content. The URL pointed t
At 4:59 PM on a Friday, I was about to close my laptop and sneak out when the QA colleague's icon flashed on DingTalk: "Come check this out. The suppo
Advanced Use of Async Hooks in Node.js Introduction: Understanding the Context of Async Hooks As the JavaScript ecosystem has ev
Two years ago, a Reddit moderator named Gary_Internet posted in r/typing and described the one feature that would make a TypeRacer competitor worth sw
Introduction Most WordPress users trust backup plugins to protect their websites. But when a server crashes, that trust collapses instantly. Backup p
Web scrapers are fragile. E-commerce sites change their HTML weekly, IPs get blocked, and your agent spends more time fixing selectors than shopping.
Most web apps feel static until the moment they don't have to be. A user submits a form, and a counter updates somewhere else on the page — no refresh
Four lines in ~/.npmrc block the most common npm supply chain attacks before they execute. Setup takes 30 seconds. This is the bare-minimum defense fo
Have you ever started coding a feature, only to realize halfway through that your architecture is hopelessly tangled? We’ve all been there. You start
Mastering Spring Boot Unit Testing with JUnit 5 and Mockito Learn how to write effective unit tests for your Spring Boot applications usin
Introduction "From Chat to Agents, from Agents to Swarms." This is the No.55 article in the "One Open Source Project a Day" series. Toda
I shipped gni-compression to npm two days ago. One of the first questions I got (from myself, running benchmarks at midnight): does it work on anythin
TL;DR: The thing that finally pushed me over the edge was discovering that my CGM app stores readings in a proprietary format, exports as a PDF (a PD
Most React performance problems are not architectural. They are not about picking the wrong state manager or choosing the wrong rendering strategy. Th
Python Decorators Explained Simply Introduction Python Decorators Explained Simply is essential knowledge for every developer.
I Sniped a Solana Token in 400ms — Here's the Full Tech Stack Yesterday, I managed to snipe a newly launched Solana token in just 400 milli
Why Your AI Agent Dies in Production (And What to Do About It) You deploy an AI research agent. It works perfectly in demos. It searches th
Riad Hasan has built secure APIs for dozens of applications. In this guide, he tackles one of the most common problems developers face: implementing r
Performance Tips for Firefox New Tab Extensions: Sub-100ms Load Times Every time someone opens a new tab, your extension loads. If it's slo