Units

A small library to convert units

Usage

import { convert } from '@vas-dev/units'

convert({ value: 20, unit: 'pound', target: 'kilogram', maxDecimals: 2 })

// 9.07

API

Note: Since this is a small wrapper around js-quantities most of the surfaced functions are the same but with different arguments

convert

import { convert } from '@vas-dev/units'

convert({
  value: 20,

  // Starting Unit
  unit: 'pound',

  // Unit to be converted to
  target: 'kilogram',

  // Number of decimals - Optional - Default: 2
  maxDecimals: 2,

  // Custom formatter, returns a string - Optional
  formatter: (scalar: number, unit: Unit) => `${scalar} ${unit}`,
})

// 9.07

add / subtract / multiply / divide

All of these operators have the same API. When using add or subtract, units can be different but must be the same type. Return value will be the unit of the left-side (first object in the array).

import { add } from '@vas-dev/units'

add(
  // Array of objects for operation
  [
    { value: 2, unit: 'pound' },
    { value: 5, unit: 'kilogram' },
  ],
  {
    // Number of decimals - Optional - Default: 2
    maxDecimals: 2,

    // Custom formatter, returns a string - Optional
    formatter: (scalar: number, unit: Unit) => `${scalar} ${unit}`,
  }
)

eq / gt / gte / lt / lte / same

Compares the left-side (first in the array) to the right-side (second in the array).

import { eq } from '@vas-dev/units'

eq([
  { value: 2, unit: 'pound' },
  { value: 5, unit: 'kilogram' },
])

// false

eq will check that quantities are the same. Example: 1kg === 1000g.

same will check that both the quantity and the unit are the same. Example: 1kg !== 1000g

Others work as you would expect them to.

compareTo

Returns a -1 if less than, 1 if greater than, 0 if equal.

import { compareTo } from '@vas-dev/units'

compareTo([
  { value: 2, unit: 'pound' },
  { value: 5, unit: 'kilogram' },
])

// -1