--- /dev/null
+/**
+ * Implements hook_entity_base_field_info().
+ */
+function {{ machine_name }}_entity_base_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type) {
+ if ($entity_type->id() == 'node') {
+ $fields = [];
+ $fields['mymodule_text'] = BaseFieldDefinition::create('string')
+ ->setLabel(t('The text'))
+ ->setDescription(t('A text property added by mymodule.'))
+ ->setComputed(TRUE)
+ ->setClass('\Drupal\mymodule\EntityComputedText');
+
+ return $fields;
+ }
+}