let items = [1, 2, 4, 5, 6]; let index = 2; const firstArr = items.slice(0, index); const secondArr = items.slice(index + 1); let newArray = [...firstArr, ...secondArr]; console.log('newArray', newArray); // [ 1, 2, 5, 6 ] => 2nd index item deleted console.log('original items', items); // [ 1, 2, 4, 5, 6 ] => original unaffected