blazsmaster

// YYYY-MM-dd
// using separator -
// https://www.regexpal.com/?fam=104039
function isDate(value) {
  return /([12]\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]))/.test(value)
}

// dd-MM-YYYY
// using separators - or . or /
// https://regexr.com/?346hf

blazsmaster

/**
 * @param {Array} array 
 * @returns {Array}
 */
function shuffleArray(array) {
  let currentIndex: number = array.length;
  let randomIndex: number;

  while (currentIndex !== 0) {
    randomIndex = Math.floor(Math.random() * currentIndex);

blazsmaster

<button type="button" id="topButton" onclick="topFunction()">Top</button>
<style>
    #topButton {
        display: none;
        position: fixed;
        bottom: 25px;
        right: 30px;
        z-index: 99;
    }
</style>