Creating a Blogging App Using React, Part 2: User Sign-Up

This tutorial demonstrates building a blog's signup functionality using functional React components. Building on the previous sign-in tutorial, this section focuses on creating the signup form and handling user registration.

Getting Started

Begin by cloning the GitHub repository from the first part of the tutorial:

git clone https://github.com/tutsplus/create-a-blogging-app-using-react

Navigate to the project directory and install dependencies:

cd my-blog
npm install

The application should be accessible at http://localhost:5000.

The Server-Side (Node.js/Express Example)

The server-side code handles user data insertion into a database. Error handling is crucial. This example uses a PostgreSQL database (adapt as needed for your chosen database):

app.post('/api/posts/userprofiletodb', (req, res, next) => {
    const values = [req.body.email, req.body.pwd]; // Corrected to use req.body
    pool.query(`INSERT INTO users(username, email, pwd, date_created)
                VALUES(, , , NOW())
                ON CONFLICT DO NOTHING`, values,
            (q_err, q_res) => {
              if(q_err) return next(q_err);
              res.json(q_res.rows);
    });
});

The Client-Side (React)

Using functional React components and useState, we manage the component's state.

Capturing Form Values

State variables track changes in the signup form fields:

const [email, setEmail] = useState('');
const [password, setPassword] = useState('');

These state variables are bound to the form inputs:

<input type="email" value="{email}" onchange="{(e)"> setEmail(e.target.value)} />
<input type="password" value="{password}" onchange="{(e)"> setPassword(e.target.value)} />

The onChange handlers update the state variables whenever the input values change. Native browser input validation (like email format checking) is utilized.

Handling Signup Submission

The handleSubmit function sends the signup data to the server using fetch or a library like Axios (recommended for security and features):

const handleSubmit = async (e) => {
  e.preventDefault();
  try {
    const response = await axios.post('/api/posts/userprofiletodb', { email, password });
    // Handle successful signup
  } catch (error) {
    // Handle errors
  }
};

Axios is preferred over the Fetch API due to its enhanced security features (e.g., cross-site forgery protection) and better error handling capabilities.

A Working Demo

A working demo is available on StackBlitz (link provided in original text).

Conclusion

This tutorial covered implementing user signup, including form handling, client-side state management, server-side data persistence, and error handling. The next part will focus on adding and displaying blog posts.

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