Next: Authentication with next-auth

Author: prathamesh-mutkure

Nextjs/nextjs-auth/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel

Nextjs/nextjs-auth/.vscode/settings.json

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+This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `pages/index.js`. The page auto-updates as you edit the file.
+
+[API routes](https://nextjs.org/docs/api-routes/introduction) can be accessed on [http://localhost:3000/api/hello](http://localhost:3000/api/hello). This endpoint can be edited in `pages/api/hello.js`.
+
+The `pages/api` directory is mapped to `/api/*`. Files in this directory are treated as [API routes](https://nextjs.org/docs/api-routes/introduction) instead of React pages.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

Nextjs/nextjs-auth/README.md

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+import { useState, useRef } from "react";
+import { signIn } from "next-auth/client";
+import classes from "./auth-form.module.css";
+import { useRouter } from "next/router";
+
+const createUser = async (email, password) => {
+  const response = await fetch("/api/auth/signup", {
+    method: "POST",
+    body: JSON.stringify({ email, password }),
+    headers: {
+      "Content-Type": "application/json",
+    },
+  });
+
+  const data = await response.json();
+
+  if (!response.ok) {
+    throw new Error(data.message || "Something went wrong!");
+  }
+
+  return data;
+};
+
+function AuthForm() {
+  const router = useRouter();
+  const [isLogin, setIsLogin] = useState(true);
+
+  const emailRef = useRef();
+  const passwordRef = useRef();
+
+  function switchAuthModeHandler() {
+    setIsLogin((prevState) => !prevState);
+  }
+
+  const handleSubmit = async (event) => {
+    event.preventDefault();
+
+    const enteredEmail = emailRef.current.value;
+    const enteredPassword = passwordRef.current.value;
+
+    if (isLogin) {
+      const result = await signIn("credentials", {
+        redirect: false,
+        email: enteredEmail,
+        password: enteredPassword,
+      });
+
+      if (result.error) {
+        console.error(result.error);
+        return;
+      }
+
+      console.log(result);
+
+      if (result.ok) {
+        router.replace("/profile");
+      }
+    } else {
+      try {
+        const result = await createUser(enteredEmail, enteredPassword);
+      } catch (err) {
+        console.error(err);
+      }
+    }
+  };
+
+  return (
+    <section className={classes.auth}>
+      <h1>{isLogin ? "Login" : "Sign Up"}</h1>
+      <form onSubmit={handleSubmit}>
+        <div className={classes.control}>
+          <label htmlFor="email">Your Email</label>
+          <input type="email" id="email" ref={emailRef} required />
+        </div>
+        <div className={classes.control}>
+          <label htmlFor="password">Your Password</label>
+          <input type="password" id="password" ref={passwordRef} required />
+        </div>
+        <div className={classes.actions}>
+          <button>{isLogin ? "Login" : "Create Account"}</button>
+          <button
+            type="button"
+            className={classes.toggle}
+            onClick={switchAuthModeHandler}
+          >
+            {isLogin ? "Create new account" : "Login with existing account"}
+          </button>
+        </div>
+      </form>
+    </section>
+  );
+}
+
+export default AuthForm;

Nextjs/nextjs-auth/components/auth/auth-form.js

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+.auth {
+  margin: 3rem auto;
+  width: 95%;
+  max-width: 25rem;
+  border-radius: 6px;
+  background-color: #38015c;
+  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
+  padding: 1rem;
+  text-align: center;
+}
+
+.auth h1 {
+  text-align: center;
+  color: white;
+}
+
+.control {
+  margin-bottom: 0.5rem;
+}
+
+.control label {
+  display: block;
+  color: white;
+  font-weight: bold;
+  margin-bottom: 0.5rem;
+}
+
+.control input {
+  font: inherit;
+  background-color: #f1e1fc;
+  color: #38015c;
+  border-radius: 4px;
+  border: 1px solid white;
+  width: 100%;
+  text-align: left;
+  padding: 0.25rem;
+}
+
+.actions {
+  margin-top: 1.5rem;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.actions button {
+  cursor: pointer;
+  font: inherit;
+  color: white;
+  background-color: #9f5ccc;
+  border: 1px solid #9f5ccc;
+  border-radius: 4px;
+  padding: 0.5rem 2.5rem;
+}
+
+.actions button:hover {
+  background-color: #873abb;
+  border-color: #873abb;
+}
+
+.actions .toggle {
+  margin-top: 1rem;
+  background-color: transparent;
+  color: #9f5ccc;
+  border: none;
+  padding: 0.15rem 1.5rem;
+}
+
+.actions .toggle:hover {
+  background-color: transparent;
+  color: #ae82cc;
+}

Nextjs/nextjs-auth/components/auth/auth-form.module.css

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+import { Fragment } from 'react';
+
+import MainNavigation from './main-navigation';
+
+function Layout(props) {
+  return (
+    <Fragment>
+      <MainNavigation />
+      <main>{props.children}</main>
+    </Fragment>
+  );
+}
+
+export default Layout;

Nextjs/nextjs-auth/components/layout/layout.js

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+import Link from "next/link";
+import { useSession, signOut } from "next-auth/client";
+
+import classes from "./main-navigation.module.css";
+import { Fragment } from "react";
+
+function MainNavigation() {
+  const [session, loading] = useSession();
+
+  const handleLogout = async () => {
+    signOut();
+  };
+
+  return (
+    <header className={classes.header}>
+      <Link href="/">
+        <a>
+          <div className={classes.logo}>Next Auth</div>
+        </a>
+      </Link>
+      <nav>
+        <ul>
+          {!session && !loading && (
+            <li>
+              <Link href="/auth">Login</Link>
+            </li>
+          )}
+          {session && (
+            <Fragment>
+              <li>
+                <Link href="/profile">Profile</Link>
+              </li>
+              <li>
+                <button onClick={handleLogout}>Logout</button>
+              </li>
+            </Fragment>
+          )}
+        </ul>
+      </nav>
+    </header>
+  );
+}
+
+export default MainNavigation;

Nextjs/nextjs-auth/components/layout/main-navigation.js

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+.header {
+  width: 100%;
+  height: 5rem;
+  background-color: #38015c;
+  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0 10%;
+}
+
+.logo {
+  font-family: 'Lato', sans-serif;
+  font-size: 2rem;
+  color: white;
+  margin: 0;
+}
+
+.header ul {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  align-items: baseline;
+}
+
+.header li {
+  margin: 0 1rem;
+}
+
+.header a {
+  text-decoration: none;
+  color: white;
+  font-weight: bold;
+}
+
+.header button {
+  font: inherit;
+  background-color: transparent;
+  border: 1px solid white;
+  color: white;
+  font-weight: bold;
+  padding: 0.5rem 1.5rem;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+.header a:hover {
+  color: #c291e2;
+}
+
+.header button:hover {
+  background-color: #c291e2;
+  color: #38015c;
+}

Nextjs/nextjs-auth/components/layout/main-navigation.module.css

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+import { useRef } from "react";
+import classes from "./profile-form.module.css";
+
+function ProfileForm(props) {
+  const newPasswordRef = useRef();
+  const oldPasswordRef = useRef();
+
+  const handleSubmit = (event) => {
+    event.preventDefault();
+
+    const newPassword = newPasswordRef.current.value;
+    const oldPassword = oldPasswordRef.current.value;
+
+    props.onPasswordChanged({
+      oldPassword,
+      newPassword,
+    });
+  };
+
+  return (
+    <form className={classes.form} onSubmit={handleSubmit}>
+      <div className={classes.control}>
+        <label htmlFor="new-password">New Password</label>
+        <input type="password" id="new-password" ref={newPasswordRef} />
+      </div>
+      <div className={classes.control}>
+        <label htmlFor="old-password">Old Password</label>
+        <input type="password" id="old-password" ref={oldPasswordRef} />
+      </div>
+      <div className={classes.action}>
+        <button>Change Password</button>
+      </div>
+    </form>
+  );
+}
+
+export default ProfileForm;