create function

src/client/js/components/Admin/Customize/CustomizeCssSetting.jsx

@@ -23,9 +23,10 @@ class CustomizeCssSetting extends React.Component {
   }
 
   async onClickSubmit() {
-    const { t } = this.props;
+    const { t, adminCustomizeContainer } = this.props;
 
     try {
+      adminCustomizeContainer.updateCustomizeCss();
       toastSuccess(t('customize_page.update_customCss_success'));
     }
     catch (err) {

src/client/js/services/AdminCustomizeContainer.js

@@ -126,4 +126,13 @@ export default class AdminCustomizeContainer extends Container {
     return customizedParams;
   }
 
+  /**
+   * Update customCss
+   * @memberOf AdminCustomizeContainer
+   * @return {string} css
+   */
+  async updateCustomizeCss() {
+    // TODO GW-534 create apiV3
+  }
+
 }