Instantiating a JSON Model

The JSON model can be used to bind controls to JavaScript object data, which is usually serialized in the JSON format.

Context

The JSON model is a client-side model and, therefore, intended for small datasets, which are completely available on the client. The JSON model does not support mechanisms for server-based paging or loading of deltas. It supports, however, two-way binding. Also, client-side models like the JSON model have no built-in support for sending data back to the server. The apps have to use, for example, model.getData() and jQuery.ajax() to send updated data to the server.

Procedure

To instantiate a JSON model, use the following code:
```
var oModel = new sap.ui.model.json.JSONModel();
```
After the instance has been created, there are different options to get the data into the model.
- The easiest option is to set data by using the setData method:
```
oModel.setData({
    firstName: "Peter",
    lastName: "Pan"
});
```
  Note The correct JSON notation uses double quotes for the keys and string values.
- Usually, you do not define your data inline in the application but load it from a server-side service using an XHR request. The JSON model, however, also has a loadData method, which loads the JSON data from the specified URL asynchronously and applies it to the model:
```
oModel.loadData("data.json");
```