| Grid System |
5 tier grid system(xs, sm, md, lg, xl). |
6 tier grid system(xs, sm, md, lg, xl, xxl). |
| Color |
It has limited colors. |
Extra colors have been added with the looks. |
| Jquery |
It has jQuery along with all the related plugins. |
Jquery is removed and it has switched to vanilla JS with some working plugins. |
| Internet Explorer |
Bootstrap 4 supports both IE 10 and 11. |
Bootstrap 5 doesn’t support IE 10 and 11. |
| Form elements |
Radio buttons and checkboxes look different in different OS and browsers. |
The look of form elements does not change on different OS or browsers. |
| Utilities API |
Utilities cannot be modified in Bootstrap 4. |
Bootstrap 5 allows us to modify and also create our own utility. |
| Vertical Classes |
Relative positioning of columns is allowed. |
Relative positioning of columns is not allowed. |
| Bootstrap Icons |
Bootstrap 4 doesn’t have its own SVG icons. |
Bootstrap 5 has its own SVG icons. |
| Jumbotron |
Bootstrap 4 supports the jumbotron. |
Bootstrap 5 doesn’t support the jumbotron. |
| Card deck |
The card deck class, used to create a set of cards with equal width and height, is available in bootstrap 4. |
Card deck class has been removed in bootstrap 5. |
| Navbar |
We have the inline-block attribute, and the default for the dropdown-menu-dark class is a white dropdown. |
The inline-block property has been removed, and the dropdown-menu-dark class now uses a black dropdown as the default. |
| Static Site Generator |
Jekyll software is used by Bootstrap 4. |
Hugo software is used by Bootstrap 5. |
