Bootstrap is used only for grid layout = other lightweight lib or custom style will be better in terms of performance and page size. Links for additional investigation, just FYI: - [Keep the Web Open with Cross-Browser Testing](https://medium.com/mozilla-tech/keep-the-web-open-with-cross-browser-testing-e3006662a042) - [Optimize CSS Delivery](https://developers.google.com/speed/docs/insights/OptimizeCSSDelivery) - [W3 Validators](https://www.w3.org/developers/tools/) - [Make the Web Work For Everyone](https://hacks.mozilla.org/2016/07/make-the-web-work-for-everyone/) - [Google's opinionated reference for building amazing web experiences](https://developers.google.com/web/fundamentals/) - [Accelerated Mobile Pages](https://developers.google.com/amp/) - [MDN: Design and accessibility](https://developer.mozilla.org/en-US/docs/Learn/Common_questions#Design_and_accessibility) - [CSS Grids](https://www.mozilla.org/en-US/developer/css-grid/) - [12 Small CSS Frameworks (Cache)](https://webcache.googleusercontent.com/search?q=cache:V9d2q-8wJgkJ:https://www.webpagefx.com/blog/web-design/small-css-frameworks/+&cd=1&hl=en&ct=clnk&gl=by) - [Critical Rendering Path](https://developers.google.com/web/fundamentals/performance/critical-rendering-path/) _Part of generic Optimization issue #39_
Bootstrap is used only for grid layout = other lightweight lib or custom style will be better in terms of performance and page size.
Links for additional investigation, just FYI:
Part of generic Optimization issue #39