chore: Usa l'API nativa di JS

.idea/inspectionProfiles/Project_Default.xml

@@ -416,7 +416,7 @@
     <inspection_tool class="HtmlUnknownTag" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="myValues">
         <value>
-          <list size="19">
+          <list size="20">
             <item index="0" class="java.lang.String" itemvalue="nobr" />
             <item index="1" class="java.lang.String" itemvalue="noembed" />
             <item index="2" class="java.lang.String" itemvalue="comment" />
@@ -436,6 +436,7 @@
             <item index="16" class="java.lang.String" itemvalue="text-field" />
             <item index="17" class="java.lang.String" itemvalue="text-area" />
             <item index="18" class="java.lang.String" itemvalue="icon-button" />
+            <item index="19" class="java.lang.String" itemvalue="mwc-circular-progress" />
           </list>
         </value>
       </option>

resources/js/Components/LoadingButton.tsx

@@ -2,6 +2,7 @@ import '@material/mwc-circular-progress';
 import '@material/mwc-button';
 
 import type {Button} from '@material/mwc-button';
+import type {CircularProgress} from '@material/mwc-circular-progress';
 import type CSS from 'csstype';
 import type {VnodeDOM} from 'mithril';
 
@@ -13,14 +14,6 @@ type Attributes = Partial<Button> & {
   icon?: string
 };
 
-declare global {
-  namespace JSX {
-    interface IntrinsicElements {
-      LoadingButton: LoadingButton
-    }
-  }
-}
-
 class LoadingButton extends Component<Attributes> {
   view() {
     return ( // @ts-ignore
@@ -60,7 +53,8 @@ class LoadingButton extends Component<Attributes> {
 
   oncreate(vnode: VnodeDOM<Attributes>) {
     super.oncreate(vnode);
-    $(this.element).find('mwc-circular-progress').attr('density', String(-7));
+    this.element.querySelector<CircularProgress>('mwc-circular-progress')
+      ?.setAttribute('density', '-7');
   }
 }