how to get the first day of the next month in javascript code example

Example 1: javascript get current day of month

new Date().getDate();//gets day of month (1-31)

Example 2: js get day month year

const d = new Date();

d.getMonth() + 1;	// Month	[mm]	(1 - 12)
d.getDate();		// Day		[dd]	(1 - 31)
d.getFullYear();	// Year		[yyyy]