@nestjs/websockets/decorators/socket-gateway.decorator.js

Nest - modern, fast, powerful node.js web framework (@websockets)

import { GATEWAY_METADATA, GATEWAY_OPTIONS, PORT_METADATA, } from '../constants.js';
export function WebSocketGateway(portOrOptions, options) {
    const isPortInt = Number.isInteger(portOrOptions);
    // eslint-disable-next-line prefer-const
    let [port, opt] = isPortInt ? [portOrOptions, options] : [0, portOrOptions];
    opt = opt || {};
    return (target) => {
        Reflect.defineMetadata(GATEWAY_METADATA, true, target);
        Reflect.defineMetadata(PORT_METADATA, port, target);
        Reflect.defineMetadata(GATEWAY_OPTIONS, opt, target);
    };
}