Expandable textarea

Pastanaga textarea is resizable like a basic HTML textarea element, but in some cases where the text can be really long and the form is in a side panel for example, the textarea may still be too small to display properly its full text content.

In such case, expandable textarea is the solution as it extends Pastanaga textarea (meaning all options from Pastanaga textarea are available) and displays a button to make the textarea fullscreen in a modal.

Extra prompt

#### Input

modalTitle
  Required string used as title for the modal opened when clicking on the expand button

### Inherited from `TextareaComponent`

#### Inputs

autoHeight
  allow textarea to expand with user entries or according to currentValue: boolean (default: false)
resizable
  boolean allowing user to resize the textarea (default: true)
rows
  number of rows displayed in the textarea (default: 1)
maxRows
  max number of rows when used in combination with autoHeight. Not used when a `maxHeight` is defined (optional)
maxHeight
  number of pixels defining the maxHeight of the textarea (optional)

#### Outputs

resizing
  Event triggered when resizing the textarea. It is triggered only if `resizable` is true, and it contains the `DOMRect` of the textarea element.

    {{codeExample}}