- CSS for modal dialog

- User can click outside modal dialog to close it

frontend/src/utils.rs

@@ -49,6 +49,23 @@ impl SelectorExt for Element {
     }
 }
 
+// Not used anymore.
+// pub trait NodeHelperExt {
+//     fn is_parent(&self, child: &Node) -> bool;
+// }
+// impl NodeHelperExt for Node {
+//     fn is_parent(&self, child: &Node) -> bool {
+//         let mut node = child.clone();
+//         while let Some(parent) = node.parent_node() {
+//             if &parent == self {
+//                 return true;
+//             }
+//             node = parent;
+//         }
+//         false
+//     }
+// }
+
 pub fn selector<T>(selectors: &str) -> T
 where
     T: JsCast,