hzzzzl

for(var i = 2; i < arr.length; i++){
  if(i !== '&'){   // i это счетчик
  arr.push( prompt('Ведите'));   // значение prompt нигде не проверяется
}

const arr = [1,2,3]

while (true) {
  const input = prompt('hi')
  if (input === '&') break
  arr.push(input)
}

console.log(arr)

Такая обертка нужна для ajax

$('.data_tour_list').slick({
  infinite: false,
  slidesToShow: 3,
  focusOnSelect: true,   // <- так?
.....

focusOnSelect
default: false

Enable focus on selected element (click)

.icon {
    margin-bottom: auto;
}

const input = "zj4zcg5shsz";
const letters = input.split("");
const permCount = 1 << input.length;
const result = new Set()

for (let perm = 0; perm < permCount; perm++) {
  // Update the capitalization depending on the current permutation
  letters.reduce((perm, letter, i) => {
    letters[i] = (perm & 1) ? letter.toUpperCase() : letter.toLowerCase();
    return perm >> 1;
  }, perm);

  result.add(letters.join(""));
}

@keyframes slide {
	0% {
		transform: translate(0, 0);
	}
	100% {
                /* хитрый момент */
		transform: translate(calc(170px * 20 * -1), 0); 
		/* each image element is 170px wide and there are twenty (before repeats) */
	}
}