params:
- name: href
  type: string
  required: true
  description: The anchor link activated when the button is pressed, for example '#top'.
- name: buttonText
  type: string
  required: false
  description: The text written on the back to top button. Defaults to 'Til toppen'.
- name: srText
  type: string
  required: false
  description: The text read aloud by screenreaders. Defaults to 'Til toppen af siden'.
- name: classes
  type: string
  required: false
  description: Classes for the back to top button.
- name: attributes
  type: string
  required: false
  description: Attributes for the back to top button.