A CRUD JavaScript class with localStorage persistance

BETTER VERSION AT: https://codepen.io/HugoGiraudel/pen/afxki

Any comment welcome!

Instanciating a new database

var db = new Database({
  name: 'MyDatabase',
  uniqueKey: 'id'
})

var obj = {
  'id': '1337',
  'name': 'John Doe',
  'email': 'john@doe.com'
}

Inserting a new entry

db.insert(obj)

Retrieving an entry

db.find(1337) 

Selecting all entries

db.findAll()
db.findAll(3) // 3 first

Updating an entry

obj['age'] = 42
db.update(obj)

Deleting an entry

db.delete(obj)  // whole object
db.delete(1337) // unique key

Dropping database

db.drop()