use let or const

Author: xuwei-k

index.html

@@ -11,11 +11,11 @@
 
 <script>
 (function(){
-  var callback = function(data){
-    for(var i = 0; i < data.tree.length; i++){
-      var tree = data.tree[i]
+  const callback = function(data){
+    for(let i = 0; i < data.tree.length; i++){
+      const tree = data.tree[i]
       if(tree.type === "tree"){
-        var path = tree.path
+        const path = tree.path
         $("#branches").append("<li><a target='_blank' href='" + path + "'>" + path + "</a></li>")
       }
     }