diff --git a/windows/left-window.uvue b/windows/left-window.uvue
index d96e8c6fa7aeee9728d3fdde38e9df56705c586c..3f618feae02454bf570b308c8e7b30df7dfafdd4 100644
--- a/windows/left-window.uvue
+++ b/windows/left-window.uvue
@@ -34,13 +34,13 @@
 			templatePage
 		},
 		computed: {
-      active(){
+      active():string{
         return state.active
       },
-      hasLeftWin(){
+      hasLeftWin():boolean{
         return !state.noMatchLeftWindow
       },
-      leftWinActive(){
+      leftWinActive():string{
         return state.leftWinActive.split('/')[3]
       }
 		},