Bootstrap media query ruleset mixins.less

/* =============================================================================
   Media queries for different screen sizes
   ========================================================================== */

// xs only
.screen-xs(@rules) {
	@media (max-width: @screen-xs-max) { @rules(); }
}

// sm and larger
.screen-sm-min(@rules) {
	@media (min-width: @screen-sm-min) { @rules(); }
}

// sm only
.screen-sm(@rules) {
	@media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) { @rules(); }
}

// sm and smaller
.screen-sm-max(@rules) {
	@media (max-width: @screen-sm-max) { @rules(); }
}

// md and larger
.screen-md-min(@rules) {
	@media (min-width: @screen-md-min) { @rules(); }
}

// md only
.screen-md(@rules) {
	@media (min-width: @screen-md-min) and (max-width: @screen-md-max) { @rules(); }
}

// md and smaller
.screen-md-max(@rules) {
	@media (max-width: @screen-md-max) { @rules(); }
}

// lg
.screen-lg(@rules) {
	@media (min-width: @screen-lg-min) { @rules(); }
}

// 1: xs only, 2: sm and larger
.screen(@rules-xs, @rules-sm) {
	.screen-xs(@rules-xs);
	.screen-sm-min(@rules-sm);
}

// 1: xs only, 2: sm only, 3: md and larger
.screen(@rules-xs, @rules-sm, @rules-md) {
	.screen-xs(@rules-xs);
	.screen-sm(@rules-sm);
	.screen-md-min(@rules-md);
}

// 1: xs only, 2: sm only, 3: md only, 4: lg and larger
.screen(@rules-xs, @rules-sm, @rules-md, @rules-lg) {
	.screen-xs(@rules-xs);
	.screen-sm(@rules-sm);
	.screen-md(@rules-md);
	.screen-lg(@rules-lg);
}