export declare class DOMExceptionPolyfill extends Error {
    constructor(message?: string, name?: string);
}
export declare function btoaPolyfill(value: string): string;
export declare function atobPolyfill(value: string): string;
export declare function queueMicrotaskPolyfill(callback: VoidFunction): void;
export declare function installWechatMpWebPolyfills(target: Record<string, any>): void;