/** Compact a CSS length so pixel-units can split it (`13.5 pt` → `13.5pt`). */
export declare const compactCssLength: (raw: string) => string;
/** Convert a CSS length to px. Unknown / keyword / % values return undefined. */
export declare const cssLengthToPx: (raw: string | null | undefined, basePx: number) => number | undefined;
export declare const cssLengthParts: (raw: string | null | undefined, basePx: number) => {
    px?: number;
    em?: number;
};