WordPress plugin that extends the JSON REST WP API with new routes pointing to WordPress registered menus. Read the WP API documentation.
/menuslist of every registered menu./menus/<id>data for a specific menu./menu-locationslist of all registered theme locations./menu-locations/<location>data for menu in specified menu in theme location.
Currently, the menu-locations/<location> route for individual menus will return a tree with full menu hierarchy, with correct menu item order and listing children for each menu item. The menus/<id> route will output menu details and a flat array of menu items. Item order or if each item has a parent will be indicated in each item attributes, but this route won't output items as a tree.
You can alter the V1 data arrangement of each individual menu items and children using the filter hook json_menus_format_menu_item.
In V1 of the REST API the routes are located by default at wp-json/menus/ etc.
In V2 the routes by default are at wp-json/wp-api-menus/v2/ (e.g. wp-json/wp-api-menus/v2/menus/, etc.) since V2 encourages prefixing and version namespacing.
You can alter the V2 data arrangement of the REST response using the filter hooks
rest_menus_format_menusto alter the list of menu items returned (e.g fromwp-json/wp-api-menus/v2/menus/)rest_menus_format_menuto alter a single menu returned (e.gwp-json/wp-api-menus/v2/menus/<id>)rest_menus_format_menu_itemto alter the menu items returned (e.gwp-json/wp-api-menus/v2/menus/<id>itemsproperty)
- Submit a pull request or open a ticket here on GitHub.

