import { minify as _minify } from 'uglify-es';
import { EventHandler } from "./event-handler";
import { FileData } from "../models";
export declare class JavascriptContentHandler extends EventHandler {
    minify: typeof _minify;
    event: string;
    processEvent: (file: FileData) => Promise<void>;
    private minfiyJavascript;
    private getMinifyOptions;
    private updateFileContents;
}