Bootstrap 4 Cheat Sheet - list of Bootstrap classes

Responsive breakpoints 

// Extra small devices (portrait phones, less than 576px)

// No media query since this is the default in Bootstrap

// Small devices (landscape phones, 576px and up)

@media (min-width: 576px) { ... }

// Medium devices (tablets, 768px and up)

@media (min-width: 768px) { ... }

// Large devices (desktops, 992px and up)

@media (min-width: 992px) { ... }

// Extra large devices (large desktops, 1200px and up)

@media (min-width: 1200px) { ... }

// Extra small devices (portrait phones, less than 576px)

@media (max-width: 575.98px) { ... }

// Small devices (landscape phones, less than 768px)

@media (max-width: 767.98px) { ... }

// Medium devices (tablets, less than 992px)

@media (max-width: 991.98px) { ... }

// Large devices (desktops, less than 1200px)

@media (max-width: 1199.98px) { ... }

// Extra large devices (large desktops)

// No media query since the extra-large breakpoint has no upper bound on its width