Others

Bootstrap

1. Flatter Buttons

2. Media queries are better

3. Flexbox support gives more flexibility

Bootstrap grids are created with Flexbox instead of Floats

4. Control spacing with classes

5. From pixels to rems (relative units of measurements)

6. New component: Cards

https://bootstrapstudio.io

https://medium.freecodecamp.org/learn-bootstrap-4-in-5-minutes-da94728efe41

https://www.freecodecamp.org/news/learn-bootstrap-5-and-sass-by-building-a-portfolio-website

https://www.freecodecamp.org/news/full-bootstrap-5-tutorial-for-beginners

MaterialUI

MUI Templates

https://mui.com/getting-started/templates

https://github.com/mui-org/material-ui/tree/master/docs/src/pages/getting-started/templates

https://github.com/mui-org/material-ui/blob/master/docs/src/pages/getting-started/templates/sign-in/SignIn.js

v5

https://mui.com/blog/mui-core-v5

https://mui.com/guides/migration-v4

https://mui.com/guides/migration-v3