Use Tiny Id

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use-tiny-id is an npm package designed to quickly create incremental IDs, so that all IDs are unique. You can run test.js to get an idea of the performance, which is similar to nanoid for generating a 21 character id.

Install

npm install use-tiny-id

Use

const Generator = require('use-tiny-id');

const myGenerator = new Generator();

console.log(myGenerator.next());// a

Constructor

new Generator(characters, options)

// creates a simple id generator
const myGenerator = new Generator();

// creates a generator with a custom alphabet
const myGenerator = new Generator('abcd');

// creates a generator with a custom alphabet and a config
const myGenerator = new Generator('abcd', {
  numberOfCharacters: 10,
  lastGeneratedId: 'aaaaaaaaac'
});

// creates a generator with a simple config
const myGenerator = new Generator();
myGenerator.config({
  numberOfCharacters: 10,
  lastGeneratedId: 'aaaaaaaaac'
});

Type definition

type UniqueIdGeneratorOptions = {
  numberOfCharacters?: number;
  lastGeneratedId?: string;
};

Methods

config(config)

Changes the generator's configuration

myGenerator.config({
  numberOfCharacters: 10,
  lastGeneratedId: 'aaaaaaaaac'
});

Type definition

type UniqueIdGeneratorOptions = {
  numberOfCharacters?: number;
  lastGeneratedId?: string;
};

count()

Returns the number of generated ids

const count: number = myGenerator.count();

increment(number)

Increments the id. It returns the generators instance, so you can chain many calls.

myGenerator.increment();

myGenerator
  .increment()
  .increment();

next()

Returns the current id and increment it

const id: string = myGenerator.next();

current()

Returns the current id without incrementing it

const id: string = myGenerator.current();

Properties

chars

The characters used to generate the ids.

// 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' by default
console.log(myGenerator.chars);

status

An array of numbers, which is the current state of the id generator.

// [0, ...]
console.log(myGenerator.status);