Fix es6 function

site/component/MainContent/index.jsx

@@ -119,8 +119,11 @@ export default class MainContent extends React.Component {
 
   getFooterNav(menuItems, activeMenuItem) {
     const menuItemsList = this.flattenMenu(menuItems);
-    const activeMenuItemIndex = menuItemsList.findIndex((menuItem) => {
-      return menuItem.key === activeMenuItem;
+    let activeMenuItemIndex = -1;
+    menuItemsList.forEach((menuItem, i) => {
+      if (menuItem.key === activeMenuItem) {
+        activeMenuItemIndex = i;
+      }
     });
     const prev = menuItemsList[activeMenuItemIndex - 1];
     const next = menuItemsList[activeMenuItemIndex + 1];

site/entry/utils.js

@@ -51,9 +51,9 @@ export function generateContainer(data) {
 
 export function generateIndex(data) {
   const menuItems = getMenuItems(data);
-  const firstChild = menuItems.topLevel.topLevel.find((item) => {
+  const firstChild = menuItems.topLevel.topLevel.filter((item) => {
     return item.disabled !== 'true';
-  });
+  })[0];
   return (
     <IndexRedirect key="index"
       to={fileNameToPath(firstChild.fileName)} />