what is bootstrap 4 default breakpoint code example

Example 1: bootstrap 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) { ... }

Example 2: bootstrap media queries

//these are the media queries used by bootstrap
/* Large desktops and laptops */
@media (min-width: 1200px) {

}

/* Landscape tablets and medium desktops */
@media (min-width: 992px) and (max-width: 1199px) {

}

/* Portrait tablets and small desktops */
@media (min-width: 768px) and (max-width: 991px) {

}

/* Landscape phones and portrait tablets */
@media (max-width: 767px) {

}

/* Portrait phones and smaller */
@media (max-width: 480px) {

}