first commit

core/themes/claro/js/checkbox.js

@@ -0,0 +1,15 @@
+/**
+ * @file
+ * Theme override for checkbox.
+ */
+
+((Drupal) => {
+  /**
+   * Constructs a checkbox input element.
+   *
+   * @return {string}
+   *   A string representing a DOM fragment.
+   */
+  Drupal.theme.checkbox = () =>
+    '<input type="checkbox" class="form-checkbox form-boolean form-boolean--type-checkbox"/>';
+})(Drupal);