Javascript diff-match-patch, made suitable for use in production:

• Modern typescript with unit tests, thanks to diff-match-patch-typescript.
• Full unicode support, thanks to PR 80
• I added full diffTimeout support, which is only partially implemented elsewhere, and is critical for production use (since otherwise your server or browser can be easily stuck at 100% for minutes). See big.test.ts.
• Modern api for creating dmp object (still backward compatible).

Installation

See https://www.npmjs.com/package/@cocalc/diff-match-patch

pnpm i @cocalc/diff-match-patch

Usage

import { DiffMatchPatch } from "@cocalc/diff-match-patch";
const dmp = new DiffMatchPatch({ diffTimeout:0.5 });
const patch = dmp.patch_make("ello", "hello world");
console.log(JSON.stringify(patch));
// [{"diffs":[[1,"h"],[0,"ello"],[1," world"]],"start1":0,"start2":0,"length1":4,"length2":11}]
dmp.patch_apply(patch, "ello");
// [ 'hello world', [ true ] ]

Documentation

Official Repository.