Get array data from angularjs

First of all, sorry for my English. I'm wondering how to get an array data from angularjs, so i can save it with nodejs.

Here is my angularjs script:

        angular.module('myAddList', [])
            .controller('myAddListController', function(){
                var addList = this;
                addList.lists = [];  

                addList.tambah = function(){
                    addList.lists.push({title:addList.listTitle,greet:addList.listGreet});
                    addList.listTitle = '', addList.listGreet = '';
                }

                addList.hapusList = function(list){
                    addList.lists.splice(addList.lists.indexOf(list), 1);
                }
            });

and here is my nodejs:

    var fs = require("fs");

    var d = new Date();

    var myJson = {title : {
          "lists": []
        }
    };

    function saveFile(){
        fs.writeFile( document.getElementById("namafile").value + ".json", JSON.stringify( myJson ), "utf8", function(err) {
            if(err) {
                return console.log(err);
            }else if(!err){
                console.log("The file was saved!");
            }
        }); 
    }

I think "myJson" should be from angularjs array which is "addList.lists = [];" but i dont know how to do that. Or maybe there is an alternative way?

-- Edit --
I think the only solution is to save the array to localStorage and save it to json format. But i have another problem it replace all whitespaces to this character "\" it so annoying.

Here is the following code (add a few changes), let's assume we already stored array to localStorage and save it using nodejs:

var fs = require("fs");
var myJson = {
    key: "myvalue"
};

var d = new Date();
var locS = localStorage.getItem("invoice");

function saveFile(){
    var nama = document.getElementById("namaFile").value;
    fs.writeFile( nama + ".json", JSON.stringify( locS ), "utf8", function(err) {
        if(err) {
            return console.log(err);
        }else if(!err){
            console.log("The file was saved!");
        }
    }); 
}
myJson = fs.readFile("undefined.json", "utf8", function (err,data) {
          if (err) {
            return console.log(err);
          }
          console.log(JSON.parse(data));
          console.log(data[2]);});

if i run this code, it give me a nice output

 console.log(JSON.parse(data));

and when i tried this

 console.log(data[2]);

it give me "\" as an output, btw here is the json file

"{\"tax\":13,\"invoice_number\":10,\"customer_info\":{\"name\":\"Mr. John Doe\",\"web_link\":\"John Doe Designs Inc.\",\"address1\":\"1 Infinite Loop\",\"address2\":\"Cupertino, California, US\",\"postal\":\"90210\"},\"company_info\":{\"name\":\"Metaware Labs\",\"web_link\":\"www.metawarelabs.com\",\"address1\":\"123 Yonge Street\",\"address2\":\"Toronto, ON, Canada\",\"postal\":\"M5S 1B6\"},\"items\":[{\"qty\":10,\"description\":\"Gadget\",\"cost\":9.95,\"$$hashKey\":\"004\"}]}"