Fix Javascript algorithms

Author: kelvins

src/javascript/Deque.js

@@ -29,7 +29,7 @@ class Deque {
     }
 }
 
-function main {
+function main() {
   let deque = new Deque();
 
   deque.addFront(2);

src/javascript/DoublyLinkedList.js

@@ -103,3 +103,17 @@ class DoublyLinkedList {
         }
     }
 }
+
+function main() {
+  let list = new DoublyLinkedList();
+
+  list.addToFront(2);
+  list.addToFront(1);
+  list.addToEnd(3);
+
+  list.readFromFront();
+  list.remove(2);
+  list.readFromEnd();
+}
+
+main();

src/javascript/Stack.js

@@ -18,4 +18,21 @@ class Stack {
     clear() {
         this.stack = [];
     }
-}
+}
+
+function main() {
+  let stack = new Stack();
+
+  stack.push(1);
+  stack.push(2);
+  stack.push(3);
+  stack.read();
+
+  stack.pop();
+  stack.read();
+
+  stack.clear();
+  stack.read();
+}
+
+main();