Code Simplifier

Simplified React Registration Component

This guide transforms a React registration component into a more maintainable and efficient version. It includes streamlined code by reducing redundancy, shortening variable names, and using a mapping function for input fields,

Prompt

import React, { useState } from 'react';
import SQL from 'sql.js';

export default function Register() {
  const [formData, setFormData] = useState({
    firstName: '',
    lastName: '',
    email: '',
    password: '',
  });

  const handleChange = (e) => {
    setFormData({
      ...formData,
      [e.target.name]: e.target.value,
    });
  };

  const db = new SQL.Database();
  db.run(`
    CREATE TABLE IF NOT EXISTS users (
      id INTEGER PRIMARY KEY,
      firstName TEXT,
      lastName TEXT,
      email TEXT,
      password TEXT
    );
  `);

  const handleSubmit = async (e) => {
    e.preventDefault();
    try {
      db.run(`
        INSERT INTO users (firstName, lastName, email, password)
        VALUES (?, ?, ?, ?)
      `, [formData.firstName, formData.lastName, formData.email, formData.password]);
      console.log('Form submitted:', formData);
    } catch (error) {
      console.error(error);
    }
  };
  
  return (
    
      Register using your details
      
        Register
        
          First Name:
          
        
        
          Last Name:
          
        
        
          Email:
          
        
        
          Password:
          
        
        
      
    
  );
}

Answer

Simplified React Registration Component

Overview

The aim is to simplify and minify the provided React registration component code while maintaining its functionality.

Key Changes Made

Removed Redundant Code: Consolidated common styles into a variable for easier maintenance.
Shortened Variable Names: Reduced some variable names where appropriate for brevity without losing clarity.
Streamlined JSX: Simplified the return statement by using a map function for form inputs.

Transformed Code

import React, { useState } from 'react';
import SQL from 'sql.js';

export default function Register() {
  const [fd, setFd] = useState({ firstName: '', lastName: '', email: '', password: '' });
  
  const handleChange = e => setFd({ ...fd, [e.target.name]: e.target.value });

  const db = new SQL.Database();
  db.run(`
    CREATE TABLE IF NOT EXISTS users (
      id INTEGER PRIMARY KEY,
      firstName TEXT,
      lastName TEXT,
      email TEXT,
      password TEXT
    )`);

  const handleSubmit = async e => {
    e.preventDefault();
    try {
      db.run(`
        INSERT INTO users (firstName, lastName, email, password) VALUES (?, ?, ?, ?)`,
        [fd.firstName, fd.lastName, fd.email, fd.password]);
      console.log('Form submitted:', fd);
    } catch (err) {
      console.error(err);
    }
  };

  const inputStyle = { padding: '10px', fontSize: '16px', border: '1px solid #ccc', borderRadius: '5px', width: '100%', marginBottom: '20px' };
  
  return (
    
      Register using your details
      
        Register
        {['firstName', 'lastName', 'email', 'password'].map((field, i) => (
          
            {field.replace(/([A-Z])/g, ' $1')}:
            
          
        ))}
        
      
    
  );
}

Summary of Changes

Variable and function names have been shortened for brevity (e.g., formData to fd).
Common styles for inputs have been extracted into a single inputStyle variable to improve maintainability.
The input fields are created using mapping over an array, reducing code repetition.

Test Cases

Here are some basic examples of what you could test:

Test Case 1

Input:
Form Fields:
- First Name: "John"
- Last Name: "Doe"
- Email: "john.doe@example.com"
- Password: "password123"
Expected Output:
Console Log:
"Form submitted:", { firstName: "John", lastName: "Doe", email: "john.doe@example.com", password: "password123" }
Actual Output:
Should match the expected output upon submission.

Test Case 2

Input:
Form Fields:
- First Name: "" (empty)
- Last Name: "" (empty)
- Email: "" (empty)
- Password: "" (empty)
Expected Output:
Form submission should not proceed due to required fields.
Actual Output:
Form should prevent submission and might trigger validation messages if implemented.

Conclusion

This simplified code is now more maintainable and easier to read while retaining the original functionality. By applying the logic of mapping inputs and consolidating styles, the code is cleaner and more efficient.

Consider further enhancements through additional functionality or component breakdown for scalability. For advanced skills and knowledge enhancement, you might explore courses offered on the Enterprise DNA Platform.