---
title: Sensor.start()
slug: Web/API/Sensor/start
tags:
  - API
  - Generic Sensor API
  - Method
  - Reference
  - Sensor
  - Sensor APIs
  - Sensors
  - start()
browser-compat: api.Sensor.start
---
{{APIRef("Sensor API")}}

The **`start`** method activates one
of the sensors based on `Sensor`.

## Syntax

```js
Sensor.start()
```

### Parameters

None.

### Return value

{{jsxref('undefined')}}

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}
