[Home](./index.md) > [puppeteer](./puppeteer.md) > [Connection](./puppeteer.connection.md) ## Connection class Signature: ```typescript export declare class Connection extends EventEmitter ``` Extends: [EventEmitter](./puppeteer.eventemitter.md) ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(url, transport, delay)](./puppeteer.connection._constructor_.md) | | Constructs a new instance of the Connection class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [\_callbacks](./puppeteer.connection._callbacks.md) | | Map<number, ConnectionCallback> | | | [\_closed](./puppeteer.connection._closed.md) | | boolean | | | [\_delay](./puppeteer.connection._delay.md) | | number | | | [\_lastId](./puppeteer.connection._lastid.md) | | number | | | [\_sessions](./puppeteer.connection._sessions.md) | | Map<string, [CDPSession](./puppeteer.cdpsession.md)> | | | [\_transport](./puppeteer.connection._transport.md) | | ConnectionTransport | | | [\_url](./puppeteer.connection._url.md) | | string | | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [\_onClose()](./puppeteer.connection._onclose.md) | | | | [\_onMessage(message)](./puppeteer.connection._onmessage.md) | | | | [\_rawSend(message)](./puppeteer.connection._rawsend.md) | | | | [createSession(targetInfo)](./puppeteer.connection.createsession.md) | | | | [dispose()](./puppeteer.connection.dispose.md) | | | | [fromSession(session)](./puppeteer.connection.fromsession.md) | static | | | [send(method, params)](./puppeteer.connection.send.md) | | | | [session(sessionId)](./puppeteer.connection.session.md) | | | | [url()](./puppeteer.connection.url.md) | | |