Biome
ELI5 — The Vibe Check
Biome is one tool that replaces both ESLint AND Prettier. Instead of configuring two tools that sometimes fight each other, you get one fast Rust-powered tool that handles linting AND formatting. Setup takes 30 seconds. Runs in milliseconds. No more 'ESLint says one thing, Prettier says another' debates. One tool, one config, done.
Real Talk
Biome is a high-performance web toolchain written in Rust that provides formatting, linting, and (planned) bundling capabilities for JavaScript, TypeScript, JSX, CSS, and JSON. It's designed as an all-in-one replacement for ESLint + Prettier with a focus on speed (100x+ faster), zero configuration, and consistent code quality. Biome supports over 250 lint rules (many from ESLint ecosystem) and opinionated formatting with minimal configuration.
When You'll Hear This
"We replaced ESLint + Prettier with Biome and CI linting went from 45s to 0.5s." / "Biome formats and lints in one pass — no more tool conflicts."
Related Terms
ESLint
ESLint is the code cop that reads your JavaScript and yells at you when you do something wrong or inconsistent.
Formatter
A formatter automatically makes all your code look consistent — same indentation, same quote style, same line breaks — so the whole team's code looks like...
Linter
A linter is the code police — it automatically checks your code for style violations, bad patterns, and potential bugs without running it.
Prettier
Prettier is an opinionated code formatter that automatically reformats your code to look consistent. Single quotes or double quotes? 2 spaces or 4?
Rust
Rust is a compiled systems programming language obsessed with memory safety.