Use same pattern for form validation

dashboard/src/components/ApplinkDialog.vue

@@ -38,26 +38,29 @@ const accessRestriction = ref({
   groups: [],
 });
 
-const isValid = computed(() => {
-  if (busy.value) return false;
-  if (!upstreamUri.value) return false;
-
-  try {
-    new URL(upstreamUri.value);
-    // eslint-disable-next-line no-unused-vars
-  } catch (e) {
-    return false;
-  }
-
-  return true;
-});
-
 let iconFile = 'src';
 function onIconChanged(file) {
   iconFile = file;
 }
 
+const form = useTemplateRef('form');
+const isFormValid = ref(false);
+function checkValidity() {
+  isFormValid.value = form.value ? form.value.checkValidity() : false;
+
+  if (isFormValid.value) {
+    try {
+      new URL(upstreamUri.value);
+      // eslint-disable-next-line no-unused-vars
+    } catch (e) {
+      isFormValid.value = false;
+    }
+  }
+}
+
 async function onSubmit() {
+  if (!form.value.reportValidity()) return;
+
   busy.value = true;
 
   const data = {
@@ -134,6 +137,8 @@ defineExpose({
     groups.value = result;
 
     applinkDialog.value.open();
+
+    setTimeout(checkValidity, 100); // update state of the confirm button
   }
 });
 
@@ -147,16 +152,16 @@ defineExpose({
     :reject-label="$t('main.dialog.cancel')"
      reject-style="secondary"
     :confirm-label="mode === 'edit' ? $t('main.dialog.save') : $t('main.action.add')"
-    :confirm-active="isValid"
+    :confirm-active="!busy && isFormValid"
     :confirm-busy="busy"
     @confirm="onSubmit()"
     @alternate="onRemove()"
   >
     <InputDialog ref="inputDialog" />
 
-    <form @submit.prevent="onSubmit()" autocomplete="off">
+    <form @submit.prevent="onSubmit()" autocomplete="off" ref="form" @input="checkValidity()">
       <fieldset :disabled="busy">
-        <input style="display: none;" type="submit" :disabled="!isValid" />
+        <input style="display: none;" type="submit" />
 
         <p class="has-error" v-show="error.generic">{{ error.generic }}</p>