Function getCommonAndChangedSubstrings

packages/utils/src/diff/index.ts:438–451

(diffs: Array<Diff>, op: number, hasCommonDiff: boolean)

}

function getCommonAndChangedSubstrings(diffs: Array<Diff>, op: number, hasCommonDiff: boolean): string {
  return diffs.reduce(
    (reduced: string, diff: Diff): string =>
      reduced
      + (diff[0] === DIFF_EQUAL
        ? diff[1]
        : diff[0] === op
          ? hasCommonDiff
            ? c.inverse(diff[1])
            : diff[1]
          : ''),
    '',
  )
}