When it comes to real website development and big projects, it is sometimes better to use both approaches to get the desired results. So following are the media queries approach I follow to create responsive websites.
/* Mobile First Approach - Smaller to Bigger Screen Size */
/* Small devices -sm- (landscape phones, 576px and up) */
@media (min-width: 576px) {
}
/* Medium devices -md- (tablets, 768px and up) */
@media (min-width: 768px) {
}
/* Large devices -lg- (desktops, 992px and up) */
@media (min-width: 992px) {
}
/* Extra large devices -xl- (large desktops, 1200px and up) */
@media (min-width: 1200px) {
}
/* Desktop First Approach - Bigger to Smaller Screen Size */
/* 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) {
}