# Biome — Fast Linter & Formatter for JS/TS

> One Rust-powered tool replaces ESLint + Prettier. 200+ lint rules, instant formatting. 97% Prettier compatible. 24K+ GitHub stars.

## Install

Copy the content below into your project:

# Biome — Fast Linter & Formatter for JS/TS

## Quick Use

```bash
npm install --save-dev --save-exact @biomejs/biome
npx @biomejs/biome init
```

```bash
# Format files
npx biome format --write .

# Lint files
npx biome lint .

# Both at once
npx biome check --write .
```

```json
// biome.json (generated by init)
{
    "$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
    "formatter": {
        "indentStyle": "space",
        "indentWidth": 2
    },
    "linter": {
        "enabled": true,
        "rules": {
            "recommended": true
        }
    }
}
```

---

## Intro

Biome is a Rust-powered toolchain with 24,200+ GitHub stars that replaces ESLint and Prettier with a single, fast tool. It formats and lints JavaScript, TypeScript, JSX, TSX, JSON, and CSS with 200+ lint rules and 97% Prettier compatibility. Biome processes files 25x faster than ESLint + Prettier combined because it parses code once (not twice) and runs in Rust (not Node.js). With built-in import sorting, VS Code extension, and zero-config defaults, Biome simplifies JavaScript tooling for AI application frontends.

Works with: JavaScript, TypeScript, JSX, TSX, JSON, CSS, Vue, Svelte, Astro, VS Code, any CI/CD. Best for JavaScript/TypeScript projects wanting faster, simpler linting and formatting. Setup time: under 1 minute.

---

## Biome Features

### Performance

| Tool | Format 1000 files | Lint 1000 files |
|------|-------------------|----------------|
| ESLint + Prettier | ~8s | ~12s |
| **Biome** | **~0.3s** | **~0.5s** |
| Speedup | **25x** | **24x** |

### 200+ Lint Rules

```json
{
    "linter": {
        "rules": {
            "recommended": true,
            "correctness": { "noUnusedVariables": "error" },
            "suspicious": { "noExplicitAny": "warn" },
            "style": { "useConst": "error" },
            "security": { "noDangerouslySetInnerHtml": "error" }
        }
    }
}
```

Categories: correctness, suspicious, style, complexity, performance, security, a11y.

### Import Sorting

```json
{
    "organizeImports": { "enabled": true }
}
```

Before:
```typescript
import { z } from 'zod';
import React from 'react';
import { useState } from 'react';
import { Button } from './components';
import axios from 'axios';
```

After:
```typescript
import React from 'react';
import { useState } from 'react';
import axios from 'axios';
import { z } from 'zod';
import { Button } from './components';
```

### VS Code Extension

Install "Biome" from VS Code Extensions. Format on save, inline diagnostics, quick fixes.

### Migration from ESLint + Prettier

```bash
# Auto-migrate your ESLint config
npx @biomejs/biome migrate eslint

# Auto-migrate your Prettier config
npx @biomejs/biome migrate prettier
```

### CI Integration

```yaml
# GitHub Actions
- name: Lint and format
  run: npx biome ci .
```

`biome ci` exits with error code if any issues found — perfect for CI gates.

---

## FAQ

**Q: What is Biome?**
A: Biome is a Rust-powered linter and formatter with 24,200+ GitHub stars that replaces ESLint + Prettier. 200+ lint rules, 25x faster, 97% Prettier compatible.

**Q: Can I migrate from ESLint + Prettier?**
A: Yes. Run `npx biome migrate eslint` and `npx biome migrate prettier` to auto-convert your configs.

**Q: Is Biome free?**
A: Yes, open-source under Apache-2.0.

---

## Source & Thanks

> Created by [Biome](https://github.com/biomejs). Licensed under Apache-2.0.
>
> [biome](https://github.com/biomejs/biome) — ⭐ 24,200+

---

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## 快速使用

```bash
npm install --save-dev @biomejs/biome
npx biome init
npx biome check --write .
```

---

## 简介

Biome 是拥有 24,200+ GitHub stars 的 Rust 驱动工具链，一个工具替代 ESLint + Prettier。200+ 检查规则，比 ESLint+Prettier 快 25x，97% Prettier 兼容。

---

## 来源与感谢

> Created by [Biome](https://github.com/biomejs). Licensed under Apache-2.0.
>
> [biome](https://github.com/biomejs/biome) — ⭐ 24,200+


---
Source: https://tokrepo.com/en/workflows/f6018b95-6783-42f1-8c39-a0d199f94504
Author: AI Open Source