src/boot/keyShortcut.js

@@ -1,6 +1,6 @@
 export default {
     mounted(el, binding) {
-        const shortcut = binding.value ?? '+';
+        const shortcut = binding.value || '+';
 
         const { key, ctrl, alt, callback } =
             typeof shortcut === 'string'
@@ -8,7 +8,7 @@ export default {
                       key: shortcut,
                       ctrl: true,
                       alt: true,
-                      callback: () => el.click(),
+                      callback: () => el?.click(),
                   }
                 : binding.value;