otion/server/index.d.ts

Atomic CSS-in-JS with a featherweight runtime

interface InjectorConfig<T> {
    /** Sets a cryptographic nonce (number used once) on the enclosing `<style>` tag when generating a page on demand. Useful for enforcing a [Content Security Policy (CSP)](https://developer.mozilla.org/docs/Web/HTTP/CSP). */
    nonce?: string;
    /** Target to insert rules into. */
    target?: T;
}
type InjectorInstance = {
    sheet?: CSSStyleSheet;
    insert(rule: string, index: number): number;
};
type VirtualInjectorInstance = InjectorInstance & {
    nonce: string | undefined;
    ruleTexts: string[];
};
/**
 * Creates an injector which collects style rules during server-side rendering.
 */
declare function VirtualInjector({ nonce, target: ruleTexts }?: InjectorConfig<string[]>): VirtualInjectorInstance;
/**
 * Transforms an injector's data into `<style>` tag properties. Useful as a base to build custom server-side renderers upon.
 *
 * @param injector Server-side style rule injector.
 *
 * @returns Properties of a `<style>` tag as an object.
 */
declare function getStyleProps(injector: ReturnType<typeof VirtualInjector>): {
    id: string;
    nonce: string | undefined;
    textContent: string;
};
/**
 * Transforms an injector's data into a `<style>` tag string.
 *
 * @param injector Server-side style rule injector.
 *
 * @returns A stringified `<style>` tag containing server-renderable CSS.
 */
declare function getStyleTag(injector: ReturnType<typeof VirtualInjector>): string;
/**
 * Filters out style rules which are not statically referenced by the given HTML code.
 *
 * @param injector Server-side style rule injector.
 * @param html HTML code of the underlying page.
 *
 * @returns A copy of the given injector instance with the unused rules filtered out.
 */
declare function filterOutUnusedRules(injector: ReturnType<typeof VirtualInjector>, html: string): ReturnType<typeof VirtualInjector>;
export { VirtualInjector, getStyleProps, getStyleTag, filterOutUnusedRules };
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