JSFiddle - React, Tailwind, and code Playground
JavaScript
let day1 = new Date( '2021-02-18T21:18:06.000Z' );
let day2 = new Date( '2020-02-18T21:18:06.000Z' );
/* var difference= Math.abs(day2-day1); */
/* days = difference/(1000 * 3600 * 24) */
console.log( (day1 - day2) );
/* console.log(vEnd - vDate); */