Grid system · Bootstrap
https://getbootstrap.com/docs/4.1/layout/gridGrid options. While Bootstrap uses ems or rems for defining most sizes, pxs are used for grid breakpoints and container widths. This is because the viewport width is in pixels and does not change with the font size. See how aspects of the Bootstrap grid system work across multiple devices with a handy table.
Grid system · Bootstrap
getbootstrap.com › docs › 4Bootstrap’s grid includes five tiers of predefined classes for building complex responsive layouts. Customize the size of your columns on extra small, small, medium, large, or extra large devices however you see fit. All breakpoints For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes.
Grid system · Bootstrap v5.0
getbootstrap.com › docs › 5Bootstrap’s grid includes six tiers of predefined classes for building complex responsive layouts. Customize the size of your columns on extra small, small, medium, large, or extra large devices however you see fit. All breakpoints For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes.