--- /dev/null
+<?php
+
+namespace Drupal\form_test\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Builds a simple form to test form button classes.
+ */
+class FormTestButtonClassForm extends FormBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'form_test_button_class';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ $form['button'] = [
+ '#type' => 'button',
+ '#value' => 'test',
+ '#button_type' => 'foo',
+ ];
+ $form['delete'] = [
+ '#type' => 'button',
+ '#value' => 'Delete',
+ '#button_type' => 'danger',
+ ];
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ }
+
+}