Intl.Segmenter implements methods for finding the location of boundaries in text, including grapheme,word and sentence boundary analysis.
Currently, chrome is shipped with Intl.v8BreakIterator - a non standard way for similar functionality. According to https://www.chromestatus.com/metrics/feature/timeline/popularity/556 on 2020 Feb there are 0.74% of the web page use it. Intl.Segmenter is the web standard to replace it.
Docs: https://docs.google.com/document/d/1xugLpLmgRFnNXK8ztariTAbD2IXueDw1T3VNuuZCz8k/edit#heading=h.xgjl2srtytjt https://docs.google.com/presentation/d/1LOOt4WPvQdOK3banHkz1V8sdl8Z-7Z9jXBRRS9Ek8-M/edit#slide=id.gc6f73a04f_0_0
Explainers: https://github.com/tc39/proposal-intl-segmenter