Issue #3349357 by vbouchet: Make field title/label translatable

src/Form/ManageComponentAttributesForm.php

@@ -145,24 +145,24 @@ class ManageComponentAttributesForm extends FormBase {
 
     $form_partial_id = [
       '#type' => 'textfield',
-      '#title' => 'ID',
+      '#title' => $this->t('ID'),
       '#description' => $this->t('An HTML identifier unique to the page.'),
     ];
     $form_partial_class = [
       '#type' => 'textfield',
-      '#title' => 'Class(es)',
+      '#title' => $this->t('Class(es)'),
       '#description' => $this->t('Classes to be applied. Multiple classes should be separated by a space.'),
       '#maxlength' => 512,
     ];
     $form_partial_style = [
       '#type' => 'textfield',
-      '#title' => 'Style',
+      '#title' => $this->t('Style'),
       '#description' => $this->t('Inline CSS styles. <em>In general, inline CSS styles should be avoided.</em>'),
       '#maxlength' => 512,
     ];
     $form_partial_data = [
       '#type' => 'textarea',
-      '#title' => 'Data-* attributes',
+      '#title' => $this->t('Data-* attributes'),
       '#description' => $this->t('Custom attributes, which are available to both CSS and JS.<br><br>Each attribute should be entered on its own line with a pipe (|) separating its name and its optional value:<br>data-test|example-value<br>data-attribute-with-no-value'),
       '#maxlength' => 512,
     ];