# Entity object

## Definition

An `entityObject` reflects the JSON representation of an [entity](/sdks/javascript/overview.md#supported-entities) from the API, but it also provides 3 methods that let you interact with that instance.

## Example

Suppose you retrieve data from a device as follows:

```javascript
const firstDevice = await Ubidots.devices.first();
```

Here, `firstDevice` is an object that contains all the properties from the API representation of a device:

```json
{
  "properties": {
    "_color": "#EA6F4C",
    "_icon": "cloud-sun",
    "_location_fixed": {
      "lat": 6.2486,
      "lng": 75.5742
    }
  },
  "createdAt": "2019-11-25T19:35:08.975270Z",
  "description": "some description",
  "id": "6e309da44fc8455a9cceb5aa",
  "isActive": true,
  "label": "first-device",
  "lastActivity": null,
  "name": "First Device",
  "organization": {
    "id": "af92e4c82bf1d39cc21882f5b",
    "label": "my-first-customer",
    "name": "My First Customer",
    "url": "http://industrial.ubidots.com/api/v2.0/organizations/af92e4c82bf1d39cc21882f5b"
  },
  "tags": ["first"],
  "url": "http://industrial.ubidots.com/api/v2.0/devices/6e309da44fc8455a9cceb5aa",
  "variables": "http://industrial.ubidots.com/api/v2.0/devices/6e309da44fc8455a9cceb5aa/variables",
  "variablesNumber": 1
}
```

In addition to the properties shown above, you can also invoke the following methods on `firstDevice`:

```javascript
firstDevice.refresh();
firstDevice.update(args);
firstDevice.save(args);
```

## Entity object methods <a href="#entity-object-methods" id="entity-object-methods"></a>

<table data-full-width="true"><thead><tr><th align="center">Method</th><th align="center">Description</th><th align="center">Usage</th><th align="center">Arguments</th><th align="center">Response</th></tr></thead><tbody><tr><td align="center"><code>refresh</code></td><td align="center">Returns the most recent state of the <code>entityObject</code> from the server.</td><td align="center"><code>Ubidots.&#x3C;entity>.&#x3C;get-method>(, [args]).refresh()</code></td><td align="center">None</td><td align="center"><code>entityObject</code></td></tr><tr><td align="center"><code>update</code></td><td align="center">Updates the <code>entityObject</code> fields on the server with the values in the object passed as an argument.</td><td align="center"><code>Ubidots.&#x3C;entity>.&#x3C;get-method>(, [args]).update(props)</code></td><td align="center"><code>props: object</code> An object with at least 1 valid property of the given <code>entity</code></td><td align="center"><code>entityObject</code></td></tr><tr><td align="center"><code>save</code></td><td align="center">Updates the entire <code>entityObject</code> on the server with the values in the object passed as an argument.</td><td align="center"><code>Ubidots.&#x3C;entity>.&#x3C;get-method>(, [args]).save(props)</code></td><td align="center"><code>props: object</code> An object containing all the properties of the given <code>entity</code></td><td align="center"><code>entityObject</code></td></tr></tbody></table>

<br>


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