Function mount

src/js/components/Elements/Elements.ts:128–140

* Called when the component is mounted.

()

   * Called when the component is mounted.
   */
  function mount(): void {
    on( EVENT_REFRESH, destroy );
    on( EVENT_REFRESH, setup );
    on( EVENT_UPDATED, update );

    bind( document, `${ POINTER_DOWN_EVENTS } keydown`, e => {
      isUsingKey = e.type === 'keydown';
    }, { capture: true } );

    bind( root, 'focusin', () => {
      toggleClass( root, CLASS_FOCUS_IN, !! isUsingKey );
    } );
  }

  /**
   * Destroys the component.