# Building Modern Web Applications with FastAPI and HTMX
In this comprehensive guide, we'll explore how to build modern, interactive web applications using FastAPI and HTMX.
## Why FastAPI + HTMX?
The combination of FastAPI and HTMX offers several advantages:
- **Simplicity**: No complex JavaScript build tools or frameworks
- **Performance**: Fast server-side rendering with dynamic updates
- **Developer Experience**: Python-first development with minimal frontend complexity
- **SEO-Friendly**: Server-rendered content that search engines love
## Getting Started
First, let's set up our FastAPI application:
```python
from fastapi import FastAPI, Request
from fastapi.templating import Jinja2Templates
app = FastAPI()
templates = Jinja2Templates(directory="templates")
@app.get("/")
async def home(request: Request):
return templates.TemplateResponse("index.html", {"request": request})
```
## Adding HTMX Interactions
HTMX allows you to add AJAX, CSS Transitions, WebSockets and Server Sent Events directly in HTML:
```html
<button hx-post="/api/contact"
hx-target="#form-message"
hx-swap="innerHTML">
Send Message
</button>
```
This creates a seamless user experience without page reloads.
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