get full month in jquery code example

Example 1: javascript month name

let date = new Date(2020, 05, 21); // 2020-06-21
let longMonth = date.toLocaleString('en-us', { month: 'long' }); /* June */
let shortMonth = date.toLocaleString('en-us', { month: 'short' }); /* Jun */
let narrowMonth = date.toLocaleString('en-us', { month: 'narrow' }); /* J */

Example 2: javascript getmonth

new Date().getMonth(); //note that Jan=0, Dec=11 (annoying I know)