export declare function findElement(selector: string): HTMLElement | null;
export declare function el<K extends keyof HTMLElementTagNameMap>(tag: K, attrs?: Partial<HTMLElementTagNameMap[K]> & {
    [k: string]: unknown;
}): HTMLElementTagNameMap[K];
export declare function injectStylesheet(id: string, css: string): void;
export declare function appendToBody(element: HTMLElement): void;