# Installation > `npm install --save @types/sockjs` # Summary This package contains type definitions for sockjs (https://github.com/sockjs/sockjs-node). # Details Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/sockjs. ## [index.d.ts](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/sockjs/index.d.ts) ````ts // Type definitions for sockjs 0.3 // Project: https://github.com/sockjs/sockjs-node // Definitions by: Phil McCloghry-Laing // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped /// import http = require('http'); export interface ServerOptions { sockjs_url?: string | undefined; prefix?: string | undefined; response_limit?: number | undefined; websocket?: boolean | undefined; jsessionid?: any; log?(severity: string, message: string): void; heartbeat_delay?: number | undefined; disconnect_delay?: number | undefined; } export function createServer(options?: ServerOptions): Server; export interface Server extends NodeJS.EventEmitter { installHandlers(server: http.Server, options?: ServerOptions): any; on(event: 'connection', listener: (conn: Connection) => any): this; on(event: string, listener: Function): this; } export interface Connection extends NodeJS.ReadWriteStream { remoteAddress: string; remotePort: number; address: { [key: string]: { address: string; port: number; }; }; headers: { [key: string]: string; }; url: string; pathname: string; prefix: string; protocol: string; readyState: number; id: string; close(code?: string, reason?: string): boolean; destroy(): void; on(event: 'data', listener: (message: string) => any): this; on(event: 'close', listener: () => void): this; on(event: string, listener: Function): this; } ```` ### Additional Details * Last updated: Tue, 06 Jul 2021 16:35:05 GMT * Dependencies: [@types/node](https://npmjs.com/package/@types/node) * Global values: none # Credits These definitions were written by [Phil McCloghry-Laing](https://github.com/pmccloghrylaing).