• Lightweight: ~3.5kb in size, vanilla JavaScript and no external dependencies 🐜
• Fast: generates 100 shortened urls in less than 5ms 🚤
• Configurable: lends ultimate control over the output format of the shortened urls 🛠️
• Tested: 100% code coverage 🎉
• MIT Licensed: free for personal and commercial use ❤️

How to install

Install with:

• NPM: npm install @studiohyperdrive/shortener
• Yarn: yarn add @studiohyperdrive/shortener

How to use

CommonJS (Node 6+)

const Shortener = require("@studiohyperdrive/shortener")

ESModule (ES2015+)

import Shortener from "@studiohyperdrive/shortener"

Configuration

An instance of the shortener can be created by calling the constructor with a configuration.

const shortener = new Shortener(configuration)

The following parameters are accepted in the configuration:

| Key | Description | Default | |-----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------| | targetrequired | A valid url to append the shortened id to, by default the id is added at the end of the url. Optionally, you can pass a placeholder {id} to reposition the id anywhere in the url. Example: https://short.er?id={0} → https://shorter?id=SP4C3 | none | | length | Length of the shortened id. | 5 | | alphabet | Alphabet with allowed characters for generating the shortened id, you can also choose one the included presets. | base58 |

Example:

const shortener = new Shortener({
  target: "https://short.er"
  length: 6,
  alphabet: "0123456789abcdefABCDEF"
})

Presets

The alphabet parameter accepts multiple presets:

| Name | Value | | -------------- | ---------------------------------------------------------------- | | alphanumeric | abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 | | alphabetic | abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ | | numeric | 0123456789 | | base58 | abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ123456789 | | base56 | abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789 | | base32 | ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 | | base16 | ABCDEF0123456789 |

Example:

const shortener = new Shortener({
  target: "https://short.er"
  alphabet: "alphanumeric"
})

.shorten(url)

Shortens a given url.

Example:

const result = shortener.shorten("https://www.google.com");

result output:

{
  id: "6VYN9",
  original: "https://www.google.com",
  target: "https://short.er/6VYN9"
}

.getInfo()

Gets information about the current configuration

Example:

const info = shortener.getInfo();

info output:

{
  config: {
    target: 'https://short.er',
    length: 5,
    alphabet: 'abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ123456789'
  },
  collisionInfo: {
    // The amount of unique shortened id's that can be generated
    // with the current configuration of length & alphabet
    possibilities: 656356768,

    //The probability of generating a non-unique shortened id
    probability: 1.5235616493254474e-9
  }
}

Examples

A minimal usage example for Express + Mongoose can be found here

Contributing

Feel free to provide feedback, open issues or create pull-requests to this repository.

License

Shortener is MIT licensed by Studio Hyperdrive.