How to work with date format in google sheets?

Question

Google Apps Script

How can I add 1 day to a date with a script? For example, how can I make it from 08/18/2020 --> 08/19/2020

I want to make a selection by date through a script, but I don’t understand how to change the date, I just tried to add one, nothing happens.

Answer 1

This is JS date
There are many options. For example:

let now = new Date();
let tomorrow = new Date(+now+24*60*60*1000);