Add bubble sort JavaScript version

sorting/README.md

@@ -10,4 +10,7 @@
 
 1. [Bubble Sort](python/bubble-sort.py)
 
+### JavaScript
+
+1. [Bubble Sort](js/bubble-sort.js)
 

sorting/js/bubble-sort.js

@@ -0,0 +1,20 @@
+// Bubble Sorting JavaScript Version
+
+function bubbleSort(arr) {
+  // Copy the contents of the input array and store them as a separate variable
+  let sorted = [...arr];
+
+  // Loop through the copied array
+  for (let i = 0; i < sorted.length; i++) {
+    // Checks if an item in the array is greater than the item next to it (index + 1)
+    if (sorted[i] > sorted[i + 1]) {
+      // If yes, swap them
+      sorted.splice(i, 2, sorted[i + 1], sorted[i]);
+    }
+  }
+  // Finally return the sorted array
+  return sorted;
+}
+
+// Log to the console and have fun
+console.log(bubbleSort([23, 34, 25, 12, 54, 11]));