Response Complete Reference

A quick reference for the res object's most commonly used properties and methods.

Property	Description
`res.app`	Reference to the current Express app instance.
`res.headersSent`	Whether response headers have already been sent.
`res.locals`	Object of variables scoped to the current request.

Method	Description
`res.append()`	Appends a value to a response header.
`res.attachment()`	Marks the response as a downloadable attachment.
`res.cookie()`	Sets a cookie.
`res.clearCookie()`	Clears a previously set cookie.
`res.download()`	Transfers a file as a downloadable attachment.
`res.end()`	Ends the response process.
`res.format()`	Performs content negotiation on the `Accept` header.
`res.get()`	Reads a response header's current value.
`res.json()`	Sends a JSON response.
`res.jsonp()`	Sends a JSON response with JSONP support.
`res.links()`	Sets `Link` response headers.
`res.location()`	Sets the `Location` response header.
`res.redirect()`	Redirects the client to another URL.
`res.render()`	Renders a view and sends the resulting HTML.
`res.send()`	Sends a response of any type.
`res.sendFile()`	Sends a file based on its path and extension.
`res.sendStatus()`	Sets the status code and sends its text as the body.
`res.set()`	Sets one or more response headers.
`res.status()`	Sets the HTTP status code.
`res.type()`	Sets the `Content-Type` header based on a MIME lookup.
`res.vary()`	Adds a field to the `Vary` response header.

Keep this table handy for quickly recalling a specific res property or method.