JSPM

{
    test: {
        data1 : {
            array : ['test','array']
        },
        data2 : 5
    }
}

var JsonDB = require('node-json-db');
//The second argument is used to tell the DB to save after each push
//If you put false, you'll have to call the save() method.
//The third argument is to ask JsonDB to save the database in an human readable format. (default false)
var db = new JsonDB("myDataBase", true, false);

//Pushing the data into the database
//With the wanted DataPath
//By default the push will override the old value
db.push("/test1","super test");

//It also create automatically the hierarchy when pushing new data for a DataPath that doesn't exists
db.push("/test2/my/test",5);

//You can also push directly objects
db.push("/test3", {test:"test", json: {test:["test"]}});

//If you don't want to override the data but to merge them
//The merge is recursive and work with Object and Array.
db.push("/test3", {new:"cool", json: {important : 5}}, false);
/*
This give you this results :
{
   "test":"test",
   "json":{
      "test":[
         "test"
      ],
      "important":5
   },
   "new":"cool"
}
*/
//You can't merge primitive.
//If you do this:
db.push("/test2/my/test/",10,false);
//the data will be overriden

//Get the data from the root
var data = db.getData("/");

//From a particular DataPath
var data = db.getData("/test1");

//If you try to get some data from a DataPath that doesn't exists
//You'll get an Error
try {
var data = db.getData("/test1/test/dont/work");
} catch(error) {
//The error will tell you where the DataPath stopped. In this case test1
//Since /test1/test does't exist.
    console.error(error);
}

//Deleting data
db.delete("/test1");

//Save the data (useful if you disable the saveOnPush)
db.save();

//In case you have a exterior change to the databse file and want to reload it
//use this method
db.reload();

var JsonDB = require('node-json-db');
//The second argument is used to tell the DB to save after each push
//If you put false, you'll have to call the save() method.
//The third argument is to ask JsonDB to save the database in an human readable format. (default false)
var db = new JsonDB("myDataBase", true, false);

//This will create an array 'myarray' with the object '{obj:'test'}' at index 0
db.push("/arraytest/myarray[0]", {obj:'test'}, true);

//The index can be also non-numerical
//This will create an array 'myarray' with the object '{obj:'test'}' with key test
db.push("/arraytest/myarray[test]", {obj:'test'}, true);

//You can retrieve a property of an object included in an array
//testString = 'test';
var testString = db.getData("/arraytest/myarray[0]/obj");

//Doing this will delete the object stored at the index 0 of the array.
//Keep in mind this won't delete the array even if it's empty.
db.delete(("/arraytest/myarray[0]");