diff --git a/client/dom/index.js b/client/dom/index.js
index 044217b1..568c86b3 100644
--- a/client/dom/index.js
+++ b/client/dom/index.js
@@ -225,7 +225,7 @@ function CmdProto() {
      * get size
      * @currentFile
      */
-    this.loadCurrentSize = callbackify(async (currentFile) => {
+    this.loadCurrentSize = async (currentFile) => {
         const current = currentFile || DOM.getCurrentFile();
         const query = '?size';
         const link = DOM.getCurrentPath(current);
@@ -241,7 +241,7 @@ function CmdProto() {
         Images.hide();
         
         return current;
-    });
+    };
     
     /**
      * load hash
diff --git a/client/key/index.js b/client/key/index.js
index f85285b7..b8d2c333 100644
--- a/client/key/index.js
+++ b/client/key/index.js
@@ -281,18 +281,18 @@ async function switchKey(event) {
         break;
     
     case KEY.SPACE:
+        event.preventDefault();
+        
         if (!isDir || name === '..')
             isSelected = true;
         else
             isSelected = DOM.isSelected(current);
         
-        exec.if(isSelected, () => {
-            DOM.toggleSelectedFile(current);
-        }, (callback) => {
-            DOM.loadCurrentSize(current, callback);
-        });
+        if (!isSelected)
+            await DOM.loadCurrentSize(current);
+        
+        DOM.toggleSelectedFile(current);
         
-        event.preventDefault();
         break;
     
     case KEY.U: