export declare class HtmlHelper {
    static escapeHtml(source: string): string;
    static addInput(type: string, name: string, id?: string, force?: boolean): HTMLInputElement;
    static loadScript(url: string, nonce?: string, async?: boolean, defer?: boolean): void;
    static loadScripts(...scripts: string[]): Promise<any[]>;
    private static internalLoadScript;
    static loadCss(url: string): void;
}