What Bootstrap class would you use in order to show an element on the page ONLY if the width of the browser window was below 768px (extra small or xs)? 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) {

}