export type BreakpointDefaults = 'xs' | 'sm' | 'md' | 'lg' | 'xl';
export type Breakpoint = BreakpointDefaults;
export type BreakpointValues = {
    [key in Breakpoint]: number;
};
export interface Breakpoints {
    unit: string;
    step: number;
    keys: Breakpoint[];
    values: BreakpointValues;
    up: (key: Breakpoint | number) => string;
    down: (key: Breakpoint | number) => string;
    between: (start: Breakpoint | number, end: Breakpoint | number) => string;
    only: (key: Breakpoint) => string;
    width: (key: Breakpoint) => number;
}
export type BreakpointsOptions = Partial<Breakpoints>;