import { addDays } from "https://deno.land/x/date_fns@v2.12.0/index.js";
Examples
// Add 10 days to 1 September 2014:
var result = addDays(new Date(2014, 8, 1), 10)
//=> Thu Sep 11 2014 00:00:00
// Add 10 days to 1 September 2014: var result = addDays(new Date(2014, 8, 1), 10) //=> Thu Sep 11 2014 00:00:00