create chrome extension context menus via json file

contextmenu.config.json

{
  "root": {
    "config": {
      "title": "Bookmarker",
      "id": "bkm",
      "contexts": [
        "all"
      ]
    },
    "children": [
      {
        "manage": {
          "config": {
            "title": "Manage links",
            "id": "read",
            "contexts": [
              "all"
            ]
          }
        }
      },
      {
        "create": {
          "config": {
            "title": "Add current page",
            "id": "create",
            "contexts": [
              "all"
            ]
          }
        }
      },
      {
        "update": {
          "config": {
            "title": "Update current page",
            "id": "update",
            "contexts": [
              "all"
            ]
          }
        }
      },
      {
        "delete": {
          "config": {
            "title": "Remove current page",
            "id": "delete",
            "contexts": [
              "all"
            ]
          }
        }
      },
      {
        "all": {
          "config": {
            "title": "Add all open tabs",
            "id": "all",
            "contexts": [
              "all"
            ]
          }
        }
      }
    ]
  }
}

contextmenu.js

//Take json file and create chrome extension context menus 

(function() {
  "use strict";

  get(chrome.extension.getURL("./background/contextmenu.config.json"), receive);

  function receive(res) {
    var data = JSON.parse(res.response);
    makemenus(data);
  }

  function makemenus(obj, parent) {
    for (var p in obj) {
      if (obj[p].config) {
        if (parent) obj[p].config.parentId = parent;
        chrome.contextMenus.create(obj[p].config);
      }
      if (obj[p].children) {
        for (var i = 0; i < obj[p].children.length; i++) {
          makemenus(obj[p].children[i], obj[p].config.id);
        }
      }
    }
  }
  
})();