declare global {
    var hljs: {
        highlight: (content: string, opts: {
            language?: string;
        }) => {
            value: string;
        };
    };
}
export declare class UwcPlaygroundElement extends HTMLElement {
    /**
     * set the default .innerHTML of the iframe.
     *
     * @default the current pages head innerHTML
     */
    static head: string;
    /**
     * the content to display
     */
    src?: string;
    /**
     * the language the content is in, e.g. html
     */
    language?: string;
    connectedCallback(): void;
}
declare global {
    const UwcPlaygroundElement: typeof import("./uwc-playground").UwcPlaygroundElement;
    type UwcPlaygroundElement = InstanceType<typeof UwcPlaygroundElement>;
}