The last thing web devs need is another toggle plugin. But this was developed for sites that already run jQuery UI and don’t want the extra bloat of yet another library. It draws upon the theme .ui-slider for the look and feel, and can be applied to <select> elements with two child options.
Configuration options and examples are contained within the UX Lab page. I guess this warrants it’s own GitHub repository for change management and issue tracking. I’ll get around to that eventually.