export interface HtmlBoundaryPolicy {
    contentSecurityPolicy: string;
    iframeSandbox: string;
    credentialMode: 'omit';
    originMode: 'separate-credentialless-origin';
}
export declare const HTML_BOUNDARY_POLICY: HtmlBoundaryPolicy;
export type HtmlViolationCode = 'MIME_MISMATCH' | 'EXTERNAL_URL' | 'FORM' | 'META_REFRESH' | 'BASE_ELEMENT' | 'SERVICE_WORKER' | 'EMBEDDED_CREDENTIAL' | 'DATA_URI_TOO_LARGE' | 'DATA_URI_INVALID' | 'DATA_URI_MIME_MISMATCH';
export interface HtmlViolation {
    code: HtmlViolationCode;
    count: number;
    offsets: number[];
    sha256: string;
}
export interface HtmlValidationOptions {
    mediaType: string;
    maxDataUriBytes?: number;
}
export interface HtmlValidationResult {
    ok: boolean;
    policy: HtmlBoundaryPolicy;
    violations: HtmlViolation[];
}
export declare function validateGeneratedHtml(html: string, options: HtmlValidationOptions): HtmlValidationResult;