NavigationHelpButton - Cesium Documentation

# NavigationHelpButton

#### new NavigationHelpButton(options)

  The NavigationHelpButton is a single button widget for displaying instructions for navigating the globe with the mouse.

  Name | Type | Description
  --- | --- | ---

  `options`

  Object

  Object with the following properties:

  Name | Type | Default | Description
  --- | --- | --- | ---
  `container` | Element | String |  | The DOM element or ID that will contain the widget.
  `instructionsInitiallyVisible` | Boolean | `false` | optional True if the navigation instructions should initially be visible; otherwise, false.

  ##### Throws:

  - DeveloperError : Element with id "container" does not exist in the document.

  ##### Example:

      // In HTML head, include a link to the NavigationHelpButton.css stylesheet,
      // and in the body, include: <div id="navigationHelpButtonContainer"></div>

      var navigationHelpButton = new Cesium.NavigationHelpButton({
          container : 'navigationHelpButtonContainer'
      });

  Source: Widgets/NavigationHelpButton/NavigationHelpButton.js, line 47

### Members

#### container :Element

  Gets the parent container.
  Source: Widgets/NavigationHelpButton/NavigationHelpButton.js, line 204

#### viewModel :NavigationHelpButtonViewModel

  Gets the view model.
  Source: Widgets/NavigationHelpButton/NavigationHelpButton.js, line 216

### Methods

#### destroy()

  Destroys the widget. Should be called if permanently removing the widget from layout.
  Source: Widgets/NavigationHelpButton/NavigationHelpButton.js, line 234

#### isDestroyed() → Boolean

  ##### Returns:

  true if the object has been destroyed, false otherwise.
  Source: Widgets/NavigationHelpButton/NavigationHelpButton.js, line 226