Creates a valid breakpoint object to use in a breakpoint system. While both the min and max arguments are optional, at least one of them must exist for the breakpoint to be considered valid.
breakpoint(name, min = NULL, max = NULL)A string with the name that identifies the breakpoint.
Optional numeric minimum value (in pixels) of the screen width where the breakpoint is active.
Optional numeric maximum value (in pixels) of the screen width where the breakpoint is active.
A breakpoint object.