JS - Array Rotation

function solve(arr, rotations){

    rotations %= arr.length;

    while(rotations > 0){

        let firstEl = arr[0];

        for(let i = 0; i < arr.length - 1; i++){
            arr[i] = arr[i+1];
        }

        arr[arr.length - 1] = firstEl;

    rotations --;
    }
    console.log(arr.join(' '));
}

solve([51, 47, 32, 61, 21], 2);