Function computeMovableDestIndex

src/js/components/Controller/Controller.ts:268–278

* Finds the dest index whose position is different with the current one for `trimSpace: 'move'`. * This can be negative or greater than `length - 1`. * * @param dest - A dest index. * * @return A dest index.

( dest: number )

   * @return A dest index.
   */
  function computeMovableDestIndex( dest: number ): number {
    if ( isSlide && options.trimSpace === 'move' && dest !== currIndex ) {
      const position = getPosition();

      while ( position === toPosition( dest, true ) && between( dest, 0, Splide.length - 1, ! options.rewind ) ) {
        dest < currIndex ? --dest : ++dest;
      }
    }

    return dest;
  }

  /**
   * Loops the provided index only in the loop mode.