let items = [1,25,"JavaScript",69,"css","34","keep coding","html"]; console.log(items) //shuffle array function shuffle(arr){ for(let i =arr.length-1;i>0;i--){ const j = Math.floor(Math.random() * (i+1)); [arr[i],arr[j]] = [arr[j],arr[i]]; } return arr } console.log(shuffle(items)) //shuffle selected index const itemToShuffle = items.slice(3,7); console.log(shuffle(itemToShuffle)) //items after shuffling item from index 3 to 7 items = [items[0],items[1],items[2],...itemToShuffle,items[7]] console.log(items)