Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
1 playbook in Frontend & Web
Structured investigations for the failure modes engineers meet in real systems.
Electron IPC Breakdown: When main and renderer stop talking
A practical guide to debugging silent IPC failures in Electron apps—where messages vanish, contextBridge fails, or preload scripts misbehave.
Capacitor Native Plugin Not Working: What to Check When the Bridge Breaks
A practical debugging guide for when a Capacitor native plugin fails silently or throws errors on iOS and Android.
Astro Component Hydration Not Working: Debugging Missing Client-Side Interactivity
A debugging guide for Astro components that fail to hydrate: symptoms, root causes, diagnosis steps, and fixes for missing client-side interactivity.
CSS Modules Class Not Found: Why Your Imported Styles Object Returns Undefined
When a CSS Modules class import resolves to undefined at runtime, the root cause is almost always a misconfiguration in your build pipeline. This guide walks through the five real reasons it happens and how to fix each one.
PostCSS Plugin Not Transforming CSS: What Actually Causes It
A practical guide to debugging PostCSS plugins that silently skip CSS transformations—covering config loading, plugin ordering, and cache issues.
Angular Change Detection Not Updating View: Debugging Guide
A direct guide to debugging when Angular's change detection fails to update the view, covering zone.js issues, OnPush pitfalls, and async operations.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Debugging Network Issues with Chrome DevTools: Timing, Waterfalls, and Hidden Columns
A practical guide to diagnosing slow requests, stalled connections, and caching bugs using the Network tab's non-obvious features.
Finding Jank in React Apps with Chrome DevTools Performance Tab
A practical walkthrough of the Performance tab for diagnosing frame drops and long tasks in React apps, with a real debugging story.
Debugging CSS Layout Issues: A Systematic Approach to Fixing Broken Layouts
A practical, step-by-step system for diagnosing and fixing CSS layout bugs — from overflow and collapsing margins to flexbox and grid misbehavior. Includes real DevTools workflows and a war story from production.
Debugging Accessibility Violations: A Systematic Approach from Audit to Fix
A practical guide to identifying, triaging, and fixing accessibility violations in web applications, covering automated tools, manual testing techniques, and common pitfalls.
Find the Real Cause of a Slow Page: A Profiling Protocol for Engineers
A practical protocol for profiling web page performance — not a list of metrics, but a repeatable process for finding what actually slows down your users.
Tracking Down Memory Leaks in Browser JavaScript: A Practical Field Guide
Memory leaks in the browser are subtle and hard to reproduce. This guide covers practical techniques to detect, isolate, and fix them using Chrome DevTools, heap snapshots, and allocation timelines.