export type LengthAxis = 'x' | 'y';
export interface LengthOptions {
    viewportWidth?: number;
    viewportHeight?: number;
    fontSize?: number;
    rootFontSize?: number;
}
export interface LengthResolveOptions {
    axis?: LengthAxis;
    relativeTo?: number;
    fontSize?: number;
    rootFontSize?: number;
    fallback?: number;
}
export declare class Length {
    private readonly options;
    constructor(options?: LengthOptions);
    resolve(value: string | number | null | undefined, options?: LengthResolveOptions): number;
    withOptions(options: LengthOptions): Length;
}
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