import type { Component } from 'svelte';
export type Demand<T> = {
    [K in keyof T]-?: {} extends {
        [P in K]: T[K];
    } ? never : K;
}[keyof T] extends [never] ? [T?] : [T];
export interface LazyComponent<T extends Component<any, any>> {
    (): Promise<{
        default: T;
    }>;
}
export interface SyvOptions {
    'syv:anchor'?: Element | Document;
    'syv:intro'?: boolean;
}
type CSSValue = false | number | 'none' | SyvCSS.GlobalValues;
export type SyvStyles<T extends string> = Record<string, CSSValue> & {
    [K in T as `--${K}`]?: CSSValue;
};
type Flexible<Union extends T, T = string> = Union | (T & Record<never, never>);
declare namespace SyvCSS {
    type GlobalValues = Flexible<'inherit' | 'initial' | 'revert' | 'revert-layer' | 'unset'>;
}
export type { Props as MetaHead } from './core/MetaHead.svelte';