TinySegmenter converted to TypeScript (and slightly more modern JS) and packaged as an npm module.
npm install @birchill/tiny-segmenter
import { TinySegmenter } from '@birchill/tiny-segmenter';
const segmenter = new TinySegmenter();
const segments = segmenter.segment('私の名前は中野です');
// segments = ['私', 'の', '名前', 'は', '中野', 'です']