import { lastDayOfMonth } from "https://deno.land/x/date_fns@v2.0.0-beta.2/index.js";
Examples
// The last day of a month for 2 September 2014 11:55:00:
var result = lastDayOfMonth(new Date(2014, 8, 2, 11, 55, 0))
//=> Tue Sep 30 2014 00:00:00
// The last day of a month for 2 September 2014 11:55:00: var result = lastDayOfMonth(new Date(2014, 8, 2, 11, 55, 0)) //=> Tue Sep 30 2014 00:00:00