diffCharacters

diffCharacters(before: string, after: string, options?: DiffOptions): DiffInlineResult

interface DiffInlineResult {
  before: readonly DiffSegment[];
  after: readonly DiffSegment[];
  similarity: number;
}

DiffInlineResult diffCharacters(String before, String after, [DiffOptions? options]);

class DiffInlineResult {
  final List<DiffSegment> before;
  final List<DiffSegment> after;
  final double similarity;
}

diffCharacters compares graphemes rather than code units, so an emoji is one piece and half a glyph is never marked as changed.

diffWords with the pieces one character long, for two lines where a word is not the unit worth marking.

A side each rather than one list between them, so joining a side back together gives the text that was passed in for it.