example

  const dmp = new DiffMatchPatch();
  const diff_main = (pre, post) => {
    dmp.Diff_Timeout = 1;
    dmp.Diff_EditCost = 5;
    const diff = dmp.diff_main(pre ? pre : "", post ? post : "");
    dmp.diff_cleanupSemantic(diff);
     //dmp.diff_cleanupEfficiency(diff);
    return diff.map((arr, i) => {
      switch (arr[0]) {
        case -1 :
          if (arr[1] === " " ){
            return <Text key={"e"+i}>{arr[1]}</Text>
          } else {
            return <Text key={"d"+i} style={[styles.del, {backgroundColor: Utils.colors().diffDel}]}>{arr[1]}</Text>
          }
        case 1:
          if (arr[1] === " " ){
            return <Text key={"e"+i}>{arr[1]}</Text>
          } else {
            return <Text key={"a"+i} style={[styles.add, {backgroundColor: Utils.colors().diffAdd}]}>{arr[1]}</Text>
          }
        default:
          return <Text key={"e"+i}>{arr[1]}</Text>
      }
    });
  },