Added Tree Inorder Traversal in JS (jainaman224#2586)

* Create Tree_Inorder_Traversal.js

* Update Tree_Inorder_Traversal.js

Tree_Inorder_Traversal/Tree_Inorder_Traversal.js

@@ -0,0 +1,38 @@
+/*
+ * Program to traverse a tree in Inorder.
+ */
+
+// Creates a Tree Node with input value
+class Node {
+    constructor(value) {
+        this.value = value;
+        this.left = null;
+        this.right = null;
+    }
+}
+
+// Function for In Order Tree Transversal
+function InOrder(root) {
+    if (root) {
+        InOrder(root.left);
+        console.log(root.value);
+        InOrder(root.right);
+    }
+}
+
+// Sample Input
+var root = new Node(1);
+root.left = new Node(2);
+root.right = new Node(3);
+root.left.left = new Node(4);
+root.left.right = new Node(5);
+root.right.left = new Node(6);
+root.right.right = new Node(7);
+
+// Sample Output
+console.log("In Order traversal of tree is:-");
+InOrder(root);
+
+/* Output
+In Order traversal of tree is:- 4 2 5 1 6 3 7
+ */