How to use

sortedIndex

function

in

lodash

// Get the next library sorted alph.
const findPreviosLibraryAlph = (list, library) => {
 // list is a Set
 const arrayList = [...list];
 const index = sortedIndex([...list], library);

 // If there is no next, return the last one
 if (index === arrayList.length) {
  return arrayList[index - 1];
 }
 return [...list][index];
}