Function lastIndexOf

lastIndexOf(string: string, searchString: string, position?: number): number
This function mirrors the lastIndexOf function from the JavaScript Standard String object. It operates on grapheme clusters instead of UTF-16 code units.

Returns the index of the last occurrence of the specified substring, or -1 if it is not found.
Parameters
- string: string
  String to search through
- searchString: string
  Substring to search for
- Optionalposition: number
  The index at or before which the occurrence must begin. If omitted, the whole string is searched. Negative values clamp to 0
Returns number
Index of the last occurrence of searchString, or -1 if not found
- Defined in lib/platform-bible-utils/src/string-util.ts:139