import { endOfMonth } from "https://deno.land/x/date_fns@v2.5.1/index.js";
Examples
// The end of a month for 2 September 2014 11:55:00:
var result = endOfMonth(new Date(2014, 8, 2, 11, 55, 0))
//=> Tue Sep 30 2014 23:59:59.999
// The end of a month for 2 September 2014 11:55:00: var result = endOfMonth(new Date(2014, 8, 2, 11, 55, 0)) //=> Tue Sep 30 2014 23:59:59.999