Bubble Sort in JavaScript

Here I am solving a problem with nested loops

// 1. Create nested loop to compare each element with the next element
// 2. Compare each element with next one and if next element is smaller then previous one, swap them
// 3. Repeat step 2 until the end of loop

const kaySort = (arr) => {
    for (let i = 0; i < arr.length; i++)
        {
        for (let j = 0; j < arr.length; j++)
            {
                if (arr[j+1] < arr[j]) {
                    let tmpSwap = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = tmpSwap;
                }
            }
        }
return arr;
}

console.log(kaySort([30,125,15,50]));