Why is Biome needed?

Biome is a modern all-in-one tool for working with code in JavaScript/TypeScript projects that combines a linter, a formatter, a code analyzer, and partial project tooling. Its main goal is to be faster, simpler, and more reliable than the ESLint + Prettier combo, while ensuring consistency and high performance.

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#What does Biome include?

1. Linting (code analysis) Biome checks code for errors, potential bugs, and non-compliance with code-style rules. Essentially, it replaces ESLint, but faster and with less configuration.
2. Code formatting Biome can fully format code, like Prettier, but does it faster.
3. Parser + Resolver It uses its own high-performance parser written in Rust that understands modern JS/TS, JSX, JSON, and other formats.
4. Automatic fixes It can fix most issues automatically (biome check --apply).
5. Unified configuration One config instead of two (as before: .eslintrc + .prettierrc).

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#Why are companies switching to Biome?

#1. Speed

Biome is written in Rust and runs tens of times faster than the ESLint + Prettier combination. The difference is especially noticeable on large monorepos.

#2. Less infrastructure noise

A single tool → fewer dependencies → fewer conflicts → less CI time.

#3. Simplicity of configuration

Instead of dozens of plugins and rules, as in ESLint, Biome works "out of the box".

#4. Support for modern features

Biome quickly adapts to new language capabilities (RSC, TypeScript decorators, new standards).

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#Typical use cases for Biome

#Linting (error checking)

• incorrect imports
• unused variables
• incorrect JS constructs
• potential bugs

#Formatting

• a consistent style for the team
• no conflicts between linter and formatter
• auto-fixes in the IDE/CI

#Use in CI/CD

• fast lint check before pushing
• format check in pull requests
• auto-fixing simple errors

#Monorepo optimization

Biome works great in large codebases, where ESLint becomes too slow.