morishittercss-value-type 
get types of CSS properties
Installation
$ npm install css-value-typeUsage
var getType = require('css-value-type')
getType('10vh') // 'length'
getType('rgb(255, 0, 0)') // 'color'License
The MIT License (MIT)
Copyright (c) 2015 Masaaki Morishita