Function _getInsertDirection

Sortable.js:2310–2316

* Gets the direction dragEl must be swapped relative to target in order to make it * seem that dragEl has been "inserted" into that element's position * @param {HTMLElement} target The target whose position dragEl is being inserted at * @return {Number} Direction dr

(target)

   * @return {Number}                   Direction dragEl must be swapped
   */
  function _getInsertDirection(target) {
    if (index(dragEl) < index(target)) {
      return 1;
    } else {
      return -1;
    }
  }

  /**
   * Generate id