If you use NextAuth within your Next.js v12.x project, you've probably faced this issue:
Can't resolve module 'next/headers'
The only way I found it was by applying a patch-package to the Next Auth package. Let's fix it:
- Change your package.json :
// package.json
"scripts": {
"postinstall": "patch-package"
}
Then execute:
yarn add -D patch-package postinstall-postinstall
After that change, you'll need to change two files inside your node_modules:
node_modules/next-auth/next/index.jsnode_modules/next-auth/src/next/index.ts
Modify them one by one:
you need to look for "next/headers" and you'll notice two pieces using it.
// node_modules/next-auth/next/index.js
// node_modules/next-auth/src/next/index.ts
if (isRSC) {
options = Object.assign({}, args[0], {
providers: []
});
const {
headers,
cookies
} = require("next/headers");
req = {
headers: Object.fromEntries(headers()),
cookies: Object.fromEntries(cookies().getAll().map(c => [c.name, c.value]))
};
res = {
getHeader() {},
setCookie() {},
setHeader() {}
};
} else {
req = args[0];
res = args[1];
options = Object.assign({}, args[2], {
providers: []
});
}
/*
* replace with else only
*/
req = args[0];
res = args[1];
options = Object.assign({}, args[2], {
providers: []
});
// node_modules/next-auth/next/index.js
// node_modules/next-auth/src/next/index.ts
// remove this const { headers, cookies } = require("next/headers")
// from async function NextAuthRouteHandler(
cookies: Object.fromEntries(
Array.from(req.cookies.entries())
.map(([name, value]) => [name, value])
),
headers: req.headers, // you don't need this as Headers
After applying those changes, you must run:
yarn patch-package next-auth
This will create the patch file. You can also refer to this gist here.
That's it. Byte bye!
P.S.: Troubleshooting
rm -rf node_modules yarn.lock package-lock.json .next
yarn
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