All bootstrap breakpoints deprecated?

Question

Looking at variables.less (and from googling around), it looks like all of bootstrap's breakpoint less variables are deprecated. Is this correct? Does anybody know what we should be using instead if we want to assign styles based on bootstrap's screen-size breakpoints? Using Bootstrap v3.1.1 with LESS. Thanks.

//== Media queries breakpoints // //## Define the breakpoints at which your layout will change, adapting to different screen sizes.  // Extra small screen / phone //** Deprecated `@screen-xs` as of v3.0.1 @screen-xs:                  480px; //** Deprecated `@screen-xs-min` as of v3.2.0 @screen-xs-min:              @screen-xs; //** Deprecated `@screen-phone` as of v3.0.1 @screen-phone:               @screen-xs-min;  // Small screen / tablet //** Deprecated `@screen-sm` as of v3.0.1 @screen-sm:                  768px; @screen-sm-min:              @screen-sm; //** Deprecated `@screen-tablet` as of v3.0.1 @screen-tablet:              @screen-sm-min;  // Medium screen / desktop //** Deprecated `@screen-md` as of v3.0.1 @screen-md:                  992px; @screen-md-min:              @screen-md; //** Deprecated `@screen-desktop` as of v3.0.1 @screen-desktop:             @screen-md-min;  // Large screen / wide desktop //** Deprecated `@screen-lg` as of v3.0.1 @screen-lg:                  1200px; @screen-lg-min:              @screen-lg; //** Deprecated `@screen-lg-desktop` as of v3.0.1 @screen-lg-desktop:          @screen-lg-min; 

Answer 1

What @seven-phases-max said. The @screen-{sm,md,lg}-min variables are the ones you should use. The others have been deprecated in favor of these.

And @screen-xs-min is deprecated because XS has no narrowest screen size (unless you want to count 1px) since it's the smallest breakpoint. (Likewise, LG has no maximum width.)