show custom fields on cards but still with dummy value

client/components/cards/cardCustomFields.js

@@ -0,0 +1,41 @@
+Template.cardCustomFieldsPopup.events({
+    'click .js-select-field'(evt) {
+        const card = Cards.findOne(Session.get('currentCard'));
+        const customFieldId = this._id;
+        card.toggleCustomField(customFieldId);
+        evt.preventDefault();
+    },
+    'click .js-configure-custom-fields'(evt) {
+        EscapeActions.executeUpTo('detailsPane');
+        Sidebar.setView('customFields');
+        evt.preventDefault();
+    }
+});
+
+const CardCustomField = BlazeComponent.extendComponent({
+    template() {
+        return 'cardCustomFieldText';
+    },
+
+    onCreated() {
+        const self = this;
+        self.date = ReactiveVar();
+        self.now = ReactiveVar(moment());
+    },
+
+    value() {
+        return "this is the value";
+    },
+
+    showISODate() {
+        return this.date.get().toISOString();
+    },
+
+    events() {
+        return [{
+            'click .js-edit-date': Popup.open('editCardStartDate'),
+        }];
+    },
+});
+
+CardCustomField.register('cardCustomField');