How persistent localStorage with Cordova 3.6.x?

I'm interested to know how persistent localStorage is on Cordova 3.6.x?

Is it good enough to store configuration of application?

What happens if I update application from AppStore/GooglePlay is it still hold the collected data of user?

If not what cordova plugin will you suggest me to use if I want a persistent and pre-populated data with cordova application?

Thanks in advance.

I've seen many links regarding local storage, unfortunately definite answer isn't found yet. I can suggest you a database, SQLite wrapper plugin

This is simple and works just fine. Hopefully it'll fulfill all your requirements including pre-populated database.

Few examples:

//Pre-populated database

//For Android & iOS (only): put the database file in the www directory and open the database like:

var db = window.sqlitePlugin.openDatabase({name: "my.db", createFromLocation: 1});

Usage

// Wait for Cordova to load
document.addEventListener("deviceready", onDeviceReady, false);

// Cordova is ready
function onDeviceReady() {
  var db = window.sqlitePlugin.openDatabase({name: "my.db"});

  db.transaction(function(tx) {
    tx.executeSql('DROP TABLE IF EXISTS test_table');
    tx.executeSql('CREATE TABLE IF NOT EXISTS test_table (id integer primary key, data text, data_num integer)');

    // demonstrate PRAGMA:
    db.executeSql("pragma table_info (test_table);", [], function(res) {
      console.log("PRAGMA res: " + JSON.stringify(res));
    });

    tx.executeSql("INSERT INTO test_table (data, data_num) VALUES (?,?)", ["test", 100], function(tx, res) {
      console.log("insertId: " + res.insertId + " -- probably 1");
      console.log("rowsAffected: " + res.rowsAffected + " -- should be 1");

      db.transaction(function(tx) {
        tx.executeSql("select count(id) as cnt from test_table;", [], function(tx, res) {
          console.log("res.rows.length: " + res.rows.length + " -- should be 1");
          console.log("res.rows.item(0).cnt: " + res.rows.item(0).cnt + " -- should be 1");
        });
      });

    }, function(e) {
      console.log("ERROR: " + e.message);
    });
  });
}

You can know everything from the documentation.