import chokidar from "chokidar";
/**
 * Listens to changes for a module and triggers the callback when data changed
 * @param dir The directory to check for changes in (path should be absolute)
 * @param onChange The callback to perform when data is changed
 * @param options Extra options
 * @returns A chokidar watcher
 */
export default function hmr(dir: string, onChange: (changedFiled: string[], affectedFiles: string[]) => void, { timeoutTime, target, }?: {
    /** The number of milliseconds to wait for before an update */
    timeoutTime?: number;
    /** The absolute path to a module, such that the onChange is only called if this module was affected */
    target?: string;
}): HMRWatcher;
/**
 * The FSWatcher returned by chokidar and HMR
 */
export declare type FSWatcher = chokidar.FSWatcher;
export declare type HMRWatcher = {
    /** The chokidar watcher */
    watcher: FSWatcher;
    /**
     * Destroys the watcher
     * @param fully Whether to also clear any previously started update timeouts
     */
    destroy(fully?: boolean): void;
};
/**
 * Requires without storing child references, such that HMR doesn't think you're dependent on the module and you should be invalidated
 * @param path The path to be required
 * @returns The output of the require call
 */
export declare function referencelessRequire(path: string): any;
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