ordinal.js

This library provides a simple utility to translate from a regular number to its ordinal representation (1 to 1st, 2 to 2nd, 3 to 3rd)

Installation

npm install ordinal-js --save

or if you rather use yarn

yarn add ordinal-js

Usage

Currently only english strategy is supported, although there are plans to extend the library and add i18n support.

Converting a number to its ordinal representation is as simple as:

Example

const ordinal = require("ordinal-js");

console.log(ordinal.toOrdinal(1)) // "1st"
console.log(ordinal.toOrdinal(2)) // "2nd"
console.log(ordinal.toOrdinal(3)) // "3rd"
console.log(ordinal.toOrdinal(4)) // "4th"

Also the function ordinalSuffix(number) is available and will return the suffix itself without prepending the number to it.

Example

const ordinal = require("ordinal-js");

console.log(ordinal.ordinalSuffix(1)) // "st"
console.log(ordinal.ordinalSuffix(2)) // "nd"
console.log(ordinal.ordinalSuffix(3)) // "rd"
console.log(ordinal.ordinalSuffix(4)) // "th"

If you don't care about prototypes pollution you can invoke the ordinal function itself and it will add two new methods (toOrdinal() and ordinalSuffix()) to Number's prototype.

Example

const ordinal = require("ordinal-js");
ordinal(); //only needed once

const someNumber = 1;

console.log(someNumber.ordinalSuffix()) //st
console.log(someNumber.toOrdinal()) //1st

Note that this approach will only work with non literal numbers (you cannot do 1.toOrdinal() while in strict mode)

API

This section describes every method in the ordinal object

toOrdinal

Description

Returns the ordinal representation of the number

@param      {Number} number       - a number, if type of the provided element is not a number then function will throw a TypeError. If NaN then "NaN" will be returned.
@param      {Function} transform  - an optional function that will be invoked with the suffix associated to the number. This can be used to perform some transformation before appending the suffix to the number itself.
@throws     {TypeError}           - if the provided parameter is not a number.

Example

const ordinal = require("ordinal-js");

console.log(ordinal.toOrdinal(12)) //12th
console.log(ordinal.toOrdinal(12, suffix => ` ${suffix.toUpperCase()}`)) //12 TH

ordinalSuffix

Description

Returns the ordinal suffix for the given number

@param      {Number} number - a number, if type of the provided element is not a number then function will throw a TypeError. If NaN undefined will be returned.
@throws     {TypeError}     -  the provided parameter is not a number.

Example

const ordinal = require("ordinal-js");

console.log(ordinal.ordinalSuffix(12)) //th