tiny-eval

A tiny, safe, and elegant arithmetic expression evaluator for TypeScript/JavaScript

✨ Features

• Tiny: Minimal dependencies, fast and lightweight
• Safe: No use of eval, parses and evaluates expressions securely
• TypeScript-first: Written in TypeScript, with full type definitions

📦 Installation

pnpm install tiny-eval

🚀 Usage

import { evaluate } from 'tiny-eval'

console.log(evaluate('1 + 2 * 3')) // 7
console.log(evaluate('(1 + 2) * 3')) // 9
console.log(evaluate('0.1 + 0.2')) // 0.3

🧪 Examples

// Basic operations
evaluate('1+2')            // 3
evaluate('5-3')            // 2
evaluate('4*2')            // 8
evaluate('8/2')            // 4

// Operator precedence
evaluate('2+3*4')          // 14
evaluate('2*3+4')          // 10

// Parentheses
evaluate('(2+3)*4')        // 20
evaluate('2*(3+4)')        // 14
evaluate('((1+2)*3)+4')    // 13

// Decimals
evaluate('0.1+0.2')        // 0.3
evaluate('1.5*2')          // 3

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## 🧑‍💻 Testing

```bash
pnpm test

📄 License

MIT License © 2025 HelKyle