Bubble sort basically compares each element in the array and swaps them by moving the larger value towards the end of the array

bubbleSort.js

/**
 * PSEUDOCODE
 * - start a loop that goes from the end to the start of the array;
 * - start a second nested loop that goes from the start to the item below the 
 * - current position of the first loop;
 * - compare each item with next item in the array
 * - if current item is greater than the next item following it 
 * - then swap current item with next item
 * - check if any swap happend at every complete iteration of the second loop
 * - if no swaps happend then break out of the outer loop cos array has been sorted
 * - return the sorted array
*/
function bubbleSort(array) {
  let swapped;
  
  for (let i = array.length; i > 0; i--) {
    swapped = false;
    
    for (let j = 0; j < i - 1; j++) {
      if (array[j] > array[j+1]) {
        // swap
        let temp = array[j+1];
        array[j+1] = array[j];
        array[j] = temp;
        
        swapped = true;
      }
    }
    
    if (!swapped) {
      break;
    }
  }
  return array;
}

bubbleSort([8, 32, 5, 32, 3, 100, 11])