JS Bin// source https://jsbin.com/kequnazawe

bubblesort.js

function bubbleSort(items) {  
  console.log(items); 
    var length = items.length;
    for (var i = (length - 1); i >= 0; i--) {
        //Number of passes
        for (var j = (length - i); j > 0; j--) {
            console.log('items[j] = ' + items[j] + ' items[j - 1] = ' + items[j - 1])
            if (items[j] < items[j - 1]) {
                //Swap the numbers
                var tmp = items[j];
                items[j] = items[j - 1];
                items[j - 1] = tmp;
                console.log(items); 
            }
        }
    }
}



bubbleSort([ 9, 10 , 3 , 7 , 1, 4 , 8])