⏳ Time Converter (toMilliseconds & fromMilliseconds)

A simple and lightweight npm package to convert time strings to milliseconds and convert milliseconds back into readable formats.

🚀 Features:

• Convert time strings like "2h", "30m", "45s", "1.5d" into milliseconds.
• Convert milliseconds into human-readable time formats.
• Works with floating-point values ("1.5h" → 5400000 ms).
• Lightweight with zero dependencies.

📦 Installation

You can install the package using npm:

npm install js-time-conversion

Or using Yarn:

yarn add js-time-conversion

🔧 Usage

Import the package in your JavaScript/Node.js project:

const { toMilliseconds, fromMilliseconds } = require("js-time-conversion");

Convert Time Strings to Milliseconds

console.log(toMilliseconds("2h"));   // 7200000
console.log(toMilliseconds("30m"));  // 1800000
console.log(toMilliseconds("45s"));  // 45000
console.log(toMilliseconds("1.5d")); // 129600000

Convert Milliseconds to Readable Time Format

console.log(fromMilliseconds(7200000));    // "2h"
console.log(fromMilliseconds(1800000));    // "30m"
console.log(fromMilliseconds(45000));      // "45s"
console.log(fromMilliseconds(129600000));  // "1.5d"

📜 API Reference

toMilliseconds(timeString)

Converts a time string to milliseconds.

| Parameter | Type | Description | Example | |------------|--------|--------------------------------------------------|---------| | timeString | string | Time string with unit (s, m, h, d) | "2h" → 7200000 |

• Throws an error if the input format is invalid.

fromMilliseconds(ms)

Converts milliseconds to a human-readable time format.

| Parameter | Type | Description | Example | |-----------|---------|---------------------------------------------|---------| | ms | number | Milliseconds to be converted | 7200000 → "2h" |

🚨 Error Handling

If an invalid format is provided, the function throws an error:

console.log(toMilliseconds("xyz")); // ❌ Error: Invalid time format. Use '1s', '2m', '3h', '1.5d'.

🛠️ Running Tests

To test the package, create a file test.js and run:

const { toMilliseconds, fromMilliseconds } = require("./index");

// Example tests
console.log(toMilliseconds("2h") === 7200000); // true
console.log(fromMilliseconds(7200000) === "2h"); // true

Run the test:

node test.js

📌 Contributing

Want to improve this package? Feel free to fork and submit a pull request.

1. Clone the repository:

   git clone https://github.com/Th85534/npm-packages.git

2. Make changes and push to a new branch.
3. Submit a Pull Request!

📜 License

This package is licensed under the MIT License.

🚀 Enjoy using Time Converter? Give it a ⭐ on GitHub!