calculate Date objects.
npm install date-calculatornpm install date-calculator
var DateCalculator = require('date-calculator');
`In Browser
`
`Example
`
var dc = new DateCalculator(new Date(2018,7,9));
dc.sub(new Date(2018,7,3)); // -> Object {days: 6, months: 0, weeks: 1, years: 0}
``