Understanding Flexbox in CSS

Flexbox is a powerful CSS layout model that makes it easy to design flexible responsive layouts without using floats or positioning. Let's create a simple demonstration of various flexbox properties.

Key Flexbox Properties

1. display: flex - Enables the flex container
2. flex-direction - Sets the main axis (row, column, row-reverse, column-reverse)
3. justify-content - Aligns items along the main axis
4. align-items - Aligns items along the cross axis
5. flex-wrap - Controls whether items wrap to new lines
6. gap - Sets spacing between flex items

Common Flexbox Use Cases

• Centering content - Use justify-content: center and align-items: center
• Navigation bars - Use justify-content: space-between for logo and nav links
• Card layouts - Use flex-wrap: wrap with gap for responsive card grids
• Form layouts - Align form elements consistently with flexbox

The interactive demo above lets you experiment with different flexbox properties to see how they affect the layout of elements.

I'll create a Next.js API route for sending data. This will be a Pages Router API endpoint that can handle different HTTP methods.

This API route creates a /api/send endpoint that:

1. Only accepts POST requests
2. Validates that the required fields (to, subject, message) are present
3. Has a placeholder for your actual sending logic
4. Returns appropriate status codes and JSON responses

You can customize this endpoint by:

• Adding authentication checks
• Implementing the actual sending logic (email, database storage, etc.)
• Adding rate limiting
• Expanding validation for the input fields

To use this endpoint, you would make a POST request to /api/send with a JSON body containing the to, subject, and message fields.