added insertion_sort-javascript

Author: SilviuCAnton

Insertion Sort/Insertion-sort-Javascript/insertion_sort.js

@@ -0,0 +1,15 @@
+const insertionSort = arr => {
+  const len = arr.length;
+  for (let i = 0; i < len; i++) {
+    let el = arr[i];
+    let j;
+
+    for (j = i - 1; j >= 0 && arr[j] > el; j--) {
+      arr[j + 1] = arr[j];
+    }
+    arr[j + 1] = el;
+  }
+  return arr;
+};
+
+console.log(insertionSort([3, 0, 2, 5, -1, 4, 1]));