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👺 weak but accurate type checking that returns a string representation of input's type

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moimikey/typeov

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typeov Build Status

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Install (~1900 bytes)

npm install --save typeov
yarn add typeov

Usage

import { typeov } from 'typeov'

const a = []

if (typeov(a) === 'array') {
  // true => array
}

if (typeof(a) === 'array') {
  // false => object
}
var typeov = require('typeov').typeov

var b = Math.PI

if (typeov(b) === 'float') {
  // true
}
const jsonString = '[{"version":"1.2.3"}]'
const isJSON = typeov(jsonString) === 'json' // true

Possible return values

  • array
  • boolean
  • buffer
  • float
  • function
  • infinity
  • json
  • map
  • null
  • number
  • object
  • promise
  • regexp
  • set
  • stream
  • symbol
  • undefined
  • weakmap
  • weakset

Notes

Be mindful of what you're checking

> typeov(Symbol)
'function'
> typeov(Symbol())
'symbol'
> typeov(Promise)
'function'
> typeov(new Promise(() => {}))
'promise'
> typeov(Promise.resolve(true))
'promise'

License

License