Issue #3375406 by Akhil Babu, vaibhav_arora, shweta__sharma, Harish1688,...

Issue #3375406 by Akhil Babu, vaibhav_arora, shweta__sharma, Harish1688, Gauravvvv, Indrapatil, smustgrave: The 'Name' field in the Add form mode is required, even though it lacks any indication of being mandatory

(cherry picked from commit f50c6a35)

core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php

@@ -87,6 +87,7 @@ public function form(array $form, FormStateInterface $form_state) {
       '#title' => $this->t('Name'),
       '#maxlength' => 100,
       '#default_value' => $this->entity->label(),
+      '#required' => TRUE,
     ];
 
     $form['description'] = [

core/modules/field_ui/tests/src/Functional/EntityDisplayModeTest.php

@@ -64,6 +64,8 @@ public function testEntityViewModeUI() {
 
     // Test adding a view mode including dots in machine_name.
     $this->clickLink('Test entity');
+    // Check if 'Name' field is required.
+    $this->assertTrue($this->getSession()->getPage()->findField('label')->hasClass('required'));
     $edit = [
       'id' => $this->randomMachineName() . '.' . $this->randomMachineName(),
       'label' => $this->randomString(),
@@ -118,6 +120,8 @@ public function testEntityFormModeUI() {
 
     // Test adding a view mode including dots in machine_name.
     $this->clickLink('Test entity');
+    // Check if 'Name' field is required.
+    $this->assertTrue($this->getSession()->getPage()->findField('label')->hasClass('required'));
     $edit = [
       'id' => $this->randomMachineName() . '.' . $this->randomMachineName(),
       'label' => $this->randomString(),