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Install PM2

Originally posted on Web Warrior ToolboxOn a server where you’ve already installed npm or pnpm, you can add PM2 to manage your backend application.If you’re not sure about your fnm/pnpm setup, check this tutorial. Why PM2?PM2 provides features you don’t get by simply running npm run start or pnpm run dev:Simple start → pm2 start dist/main.jsHealth check → pm2 ls shows running appsAuto‑restart on reboot → configure with pm2 startupConsistency → same commands everywhere, instead of arbitrary

Know Your WebDev Math: Dynamic positioning with trigonometry

When I needed to pass Calculus and Algebra during my Computer Science degree, I used the formula known to every Polish student called 'ZZZ' (Zakuć, Zdać, Zapomnieć) - Cram, Pass, Forget. It means memorizing just enough to pass the exam and then not caring if you'll remember any of it later.Fast forward a few years into my web developer career and I needed to implement a mouseMove event on the SVG element. Every move I made with my mouse made the element's position shoot off into the void. I solv

Mistakes I Made Building My First SaaS Starter Kit

Over the past few weeks, I worked on building my first reusable SaaS starter kit using Next.js, Prisma, JWT authentication, and Lemon Squeezy billing.The goal was simple:Stop rebuilding the same foundation every time I start a new SaaS idea.But while building it, I made a lot of mistakes — and honestly, those mistakes taught me more than the successful parts.Here are some of the biggest lessons I learned.1. I Tried to Build Everything at OnceAt the beginning, I wanted the starter kit to include:

A Taxonomy of Shopify App-Theme Conflicts: 147 Issues Classified

Our first three articles documented the damage: 53 stores, 147+ conflicts, CSS specificity cascading in 70% of cases, z-index values exceeding 90,000 in five stores. We've also published two technical guides — one on debugging workflows, one on CSS specificity mechanics.This article does something different. It's a classification framework — a taxonomy of the conflict types we found, organized so that when you encounter a new conflict, you can reason about it precisely instead of guessing.The ta

📥 Customize Joget Inbox Lists with JavaScript

1. OverviewThis article shows how to customize a Joget inbox or datalist using JavaScript. The script moves row action columns, localizes filter labels and buttons, adds clear icons to text filters, and formats status cells with CSS-friendly labels. 2. How It WorksMove action columns to the first position for easier access.Update filter placeholders using Joget hash variables.Rename inbox action links such as approve/reject or resubmission.Add clear buttons beside text filters.Convert

🧮 Update Joget Form Grid Cells with JavaScript

1. OverviewThis article shows how to add rows to a Joget Enterprise Form Grid and update a specific cell value with JavaScript. The example also recalculates a row number after grid changes. 2. How It WorksRead selected form values when the button is clicked.Validate required values before adding a row.Call the grid's generated add function.Store row data as JSON.On grid change, loop through rows and update a target cell.Use enterpriseformgrid("fillValue", ...) to write the updated JS

Shopify Data Mapping Strategies: Patterns That Prevent Silent Integration Failures

Poor data quality costs $12.9M per year on average (Gartner, 2022). In Shopify integrations, the failure mode is specific: an unmapped field silently drops a value, an incorrect type coercion truncates a price, a missing enum routes an order to the wrong fulfillment channel.Here is the complete mapping architecture that prevents each failure type.The 8 Mapping Patterns Reference Pattern Use Case Complexity Failure Risk Direct field mapping Same dat

Error Propagation with Custom Error Types

Error Propagation with Custom Error Types in JavaScript Historical and Technical ContextError handling has been a fundamental part of programming languages since their inception, and JavaScript is no exception. The language evolved primarily on the client side, where dynamic content and user interaction necessitated graceful error management. Traditional approaches used the generic Error class, which, while functional, didn’t provide the necessary granularity for complex applications.

Stop Using WebSockets for Everything 🚨

When developers hear "real-time communication," the first thing that comes to mind is usually WebSockets.But here's the thing:WebSockets are not always the best solution.Choosing the wrong real-time technology can add unnecessary complexity, infrastructure costs, and maintenance headaches.Let's look at some alternatives and when you should use them. 1. Server-Sent Events (SSE)SSE allows the server to push updates to the client over a regular HTTP connection.Perfect for:✅ Live dashboards✅ No

JavaScript

JavaScript is one of the most popular programming languages in web development. It is mainly used to make websites interactive and dynamic. With JavaScript, we can create things like buttons, animations, calculators, login forms, games, and much more. VariablesVariables used to store data in JavaScript. JavaScript has 3 ways to create variables:varletconstvarvar has global scope and it is the old way of declaring variables.var a = 10;console.log(a);output:10letlet has block scope. It c

Stop Overpaying for PDF Processing: Extract Pages in Your Browser

Stop Overpaying for PDF Processing: Extract Pages in Your BrowserIf you have ever built a document management dashboard, you know the pain of PDF handling. Most developers reach for a serverless function—an AWS Lambda or a Cloud Function—to extract specific pages from a user-uploaded PDF. You write a node script using pdf-lib or pdf-parse, deploy it, and watch your compute bills spike the moment a user starts hitting your app with multi-megabyte files. But here is the secret: you do not ne

Stop Paying for Serverless PDF Processing: Do It in the Browser Instead

Stop Paying for Serverless PDF Processing: Do It in the Browser InsteadIf you have spent any time architecting document-heavy web applications, you know the pain of server-side PDF manipulation. We have all been there: setting up an AWS Lambda or a specialized Docker container just to extract a single page from a PDF file. You deal with cold starts, memory limit errors, and the inevitable cost of compute cycles for a task that feels like it should be trivial. But here is the secret: for mo

Stop the Lag: Optimizing Heavy Browser-Based PDF Image Extraction

Browser-based PDF processing is a performance minefield. When you attempt to extract high-resolution images from a multi-page PDF document entirely on the client side, you are essentially asking your user's browser to juggle memory allocation and CPU cycles in a single-threaded environment. It is the classic recipe for a frozen UI, a frustrated user, and a heap memory overflow that crashes the tab instantly. I have spent countless late nights fighting with bloated vendor libraries and inef

Debugging Heavy Browser Execution: Optimizing PDF Image Extraction Without Crashing the UI

Stop Blocking the Main Thread: The Reality of Browser-Based Image ExtractionWe have all been there. You get a feature request to 'just extract these images from a PDF in the browser,' and it sounds simple enough. You install a library like pdf.js, write a quick loop to render the pages to a canvas, and suddenly your memory usage spikes, the UI freezes, and the browser throws an 'Aw, Snap!' error. Handling heavy browser-based execution of PDF tasks is not a trivial task; it is a battle agai

Stop Blocking the Main Thread: Browser-Based PDF Image Extraction Demystified

We've all been there—trying to squeeze high-performance file processing into a single-threaded JavaScript environment while keeping the UI snappy. For frontend developers, the task of extracting image assets from a PDF document often feels like a death sentence for your app’s performance, especially when dealing with client-side execution. You aren't alone; learning how to format JSON local safely or decoding blobs without freezing the DOM is a rite of passage for every senior dev. Th

Debugging Heavy Browser Execution: Optimizing PDF Image Extraction for Frontend

We've all been there. You get a requirement to handle document processing directly in the browser. "Extract images from a PDF? Easy," you think. You reach for a library, drop it into your React project, and suddenly, your browser tab eats 2GB of RAM, the UI thread freezes for six seconds, and the user's laptop fan sounds like a jet engine taking off. Today, let's talk about the brutal reality of heavy browser-based execution, specifically focusing on how to extract image from PDF files wit

Debugging Browser Memory Leaks in Heavy Client-Side PDF Image Extraction

Avoiding Browser Crashes During PDF Image ExtractionWorking with heavy binary data in the browser is a rite of passage for every frontend engineer. We have all been there: you are tasked with building a client-side utility to extract images from PDF files, and suddenly your memory usage spikes, the UI thread locks up, and the browser decides it is time to crash. Dealing with large documents in a single-threaded environment requires a shift in how we think about memory allocation and event

Debugging Browser-Based PDF-to-Image Processing: Managing Memory and CPU Threads

Processing PDFs in the browser seems like a dream until you hit the RAM ceiling. We have all been there: a client asks for a feature to extract images from a multi-page PDF directly on the client side to avoid server costs and latency. You think, 'It's just JavaScript, how hard can it be?' You import a library like pdf.js, run your rendering loops, and suddenly your browser tab is consuming 2GB of RAM, the UI is frozen, and your MacBook fans are sounding like a jet engine taking off. Deali

Handling Network Drops: Build Offline-Aware React UIs âš¡

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Designing a High-Throughput Ebook Converter: Fixing Main Thread Freezes with Chunked Readers

Designing a Responsive Browser-Based Ebook Converter Without Melting the Main ThreadHave you ever tried to parse a 150MB EPUB or convert a complex PDF document directly inside a browser tab, only to watch your beautiful UI completely freeze? I spent three sleepless nights debugging why our in-browser file processing pipeline turned a sleek application into an unresponsive nightmare. The main thread would freeze, mouse clicks ignored, and the browser would inevitably throw the dreaded "Page