Function getIndexOfItem

core/src/components/popover/utils.ts:360–366

(items: HTMLIonItemElement[], item: HTMLElement | null)

 * Returns the index of an ion-item in an array of ion-items.
 */
export const getIndexOfItem = (items: HTMLIonItemElement[], item: HTMLElement | null) => {
  if (!item || item.tagName !== 'ION-ITEM') {
    return -1;
  }

  return items.findIndex((el) => el === item);
};

/**
 * Given an array of elements and a currently focused ion-item