Biome: A Front-End Developer's Deep Dive into the Next-Gen Linting and Formatting Tool

Introduction: Why Biome Matters in 2025

As a front-end developer, I’m always chasing tools that make my life easier without sacrificing code quality. In 2025, Biome has caught my eye—a Rust-powered tool that’s shaking up linting and formatting in the JavaScript world. It’s fast, unified, and perfect for modern stacks. Here’s my take on why it’s worth your time.

What Is Biome?

Biome is an open-source tool for linting, formatting, and code analysis, all in one. Written in Rust, it’s designed to replace fragmented setups like ESLint + Prettier. It supports:

• JavaScript
• TypeScript
• JSX
• JSON

I started using it in early 2025 on a React project—and I haven’t looked back.

Getting Started: Installation and Setup

Here’s how I set it up:

npm install --save-dev @biomejs/biome
npx biome init

{
  "formatter": {
    "enabled": true,
    "indentStyle": "space",
    "indentSize": 2
  },
  "linter": {
    "enabled": true,
    "rules": {
      "style": {
        "noUnusedVariables": "error"
      },
      "suspicious": {
        "noImplicitAny": "warn"
      }
    }
  },
  "javascript": {
    "formatter": {
      "quoteStyle": "single"
    }
  }
}

Run npx biome check . for linting or npx biome format --write . for formatting. Done!

Key Features That Won Me Over Blazing Speed Biome’s Rust core is insanely fast—10-20x quicker than ESLint on my projects. Unified Workflow No more config clashes between tools. It’s all in one place. Smart Diagnostics Example error:

file.tsx:12:5 lint/style/noUnusedVariables ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
× 'x' is defined but never used.

Real-World Example: Refactoring a React Component

Before:

const Button = (props) => {
  let text=props.text;
  return <button onClick={props.onClick}>{text}</button>
}

After Biome:

const Button = ({ text, onClick }) => {
  return <button onClick={onClick}>{text}</button>;
};

Cleaner, faster, better.