Function update

src/js/components/Elements/Elements.ts:160–172

* Updates the status of elements.

()

   * Updates the status of elements.
   */
  function update(): void {
    removeClass( root, rootClasses );
    removeClass( track, trackClasses );

    rootClasses  = getClasses( CLASS_ROOT );
    trackClasses = getClasses( CLASS_TRACK );

    addClass( root, rootClasses );
    addClass( track, trackClasses );

    setAttribute( root, ARIA_LABEL, options.label );
    setAttribute( root, ARIA_LABELLEDBY, options.labelledby );
  }

  /**
   * Collects elements which the slider consists of.