Knowledge Index — 지식 지도

Making your app work offline requires understanding Service Worker caching strategies. Cache-first, network-first, and stale-while-revalidate explained.

Parsing a CSV file froze the entire UI. Web Workers run heavy computation in a separate thread, keeping the UI responsive.

Imported one lodash function but got the entire library in my bundle. Making tree shaking actually work requires understanding ES modules.

2MB bundle meant 5-second initial load. Lazy loading and code splitting load only what's needed, cutting it to 2 seconds.

SQLite is just for mobile apps? Turso and Litestream made it a serious option for production web services with edge replication.

Adding a column to a production table locked it for 5 minutes. Learning zero-downtime migration strategies the hard way.

You don't always need Elasticsearch. PostgreSQL's built-in Full-Text Search handles most search needs without extra infrastructure.

Beyond basic SELECT: JSONB, CTEs, and Window Functions dramatically expand what you can do in a single SQL query.

I only used Redis as a cache until I discovered it handles sessions, leaderboards, pub/sub, and rate limiting. It's a Swiss Army knife.

Manual builds and deploys led to shipping bugs to production. GitHub Actions automated my pipeline and eliminated human error.

Serving static files from your server works at small scale, but traffic spikes can bring it down. S3 + CloudFront separates static delivery from your app server for any scale.

I've deployed on all three platforms. Each has clear strengths in pricing, speed, and features. Here's how to choose for your project.

Server in the US meant slow responses for Korean users. Cloudflare Workers runs code at 300+ edge locations, cutting latency dramatically.

They all look the same at first, but each cloud has distinct strengths. A startup founder's guide to choosing the right cloud provider.

Managing isLoading, isError, and data separately creates impossible states. Discriminated unions make illegal states unrepresentable.

Tired of typo bugs in CSS class names and event strings? Template Literal Types let you enforce string patterns at compile time.

When your function's return type depends on input, conditional types replace 'any' with precise type inference. Type-level if-else explained.

Dealing with union types where API responses could be success or error? Type guards changed how I handle runtime type checking entirely.

I kept creating duplicate types until I discovered utility types. Partial, Pick, Omit, and Record let you transform existing types effortlessly.

Tired of writing setup docs for every new team member? docker compose up spins up your DB, Redis, and app server in one command.