files/en-us/web/api/headers/getsetcookie/index.md
{{APIRef("Fetch API")}} {{AvailableInWorkers}}
The getSetCookie() method of the {{domxref("Headers")}} interface returns an array containing the values of all {{httpheader("Set-Cookie")}} headers associated with a response. This allows {{domxref("Headers")}} objects to handle having multiple Set-Cookie headers, which wasn't possible prior to its implementation.
This method is intended for use on server environments (for example Node.js). Browsers block frontend JavaScript code from accessing the {{httpheader("Set-Cookie")}} header, as required by the Fetch spec, which defines Set-Cookie as a forbidden response-header name that must be filtered out from any response exposed to frontend code.
getSetCookie()
None.
An array of strings representing the values of all the different Set-Cookie headers associated with a response.
If no Set-Cookie headers are set, the method will return an empty array ([ ]).
As alluded to above, running code like the following on the client won't return any results — Set-Cookie is filtered out from {{domxref("Headers")}} retrieved over the network.
fetch("https://example.com").then((response) => {
console.log(response.headers.getSetCookie());
// No header values returned
});
However, the following could be used to query multiple Set-Cookie values. This is much more useful on the server, but it would also work on the client.
const headers = new Headers({
"Set-Cookie": "name1=value1",
});
headers.append("Set-Cookie", "name2=value2");
headers.getSetCookie();
// Returns ["name1=value1", "name2=value2"]
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