I'm pretty sure this library simply forks SweetAlert to use Bootstrap's markup and Less variables. So it comes out of the box plugging into Bootstrap CSS and your overrides (like, I imagine, a Bootstrap theme from bootswatch.com).
I have a Bootstrap CSS + React app that uses React for everything I'd need Bootstrap JS for. The cost of Bootstrap JS is 9.9kb + 32.5kb (jQuery) = 42.4kb. Meanwhile, SweetAlerts JS weighs 3kb gzipped and comes with a simple API for exactly what I want to do.
