getSpinner(element) {
    return element.__bunny_spinner || false;
  }
SVG Spinner Component

Creates inline <svg class="{className}"><use xlink:href="#{icon}"></svg>
and appends it to any 'element'

Use Spinner.toggle(element) to add/remove spinner

If `element` itself is an inline <svg>,
  then saves original icon ID
  and changes only xlink:href attribute
  instead of creating and appending new one <svg>
  Useful, for example, when search icon temporary could be replaced with spinner