A YouTube tutorial I've made can be found here.

Feel free to contact me on x(twitter). if you have any questions.

The steps I followed are the following.

You need to install

FastAPI

pip install fastapi

ASGI Server

pip install "uvicorn[standard]"

Templating Engine

For this example we will be using Jinja2

pip install Jinja2

Create a "templates" folder in your project

Inside this folder create a "base.html" file

Add the TemplateResponse to your route response

from fastapi import FastAPI, Request
from fastapi.templating import Jinja2Templates

app=FastAPI()

templates=Jinja2Templates(directory="templates")

@app.get("/")
async def index(request:Request):
    return templates.TemplateResponse("base.html",{"request":request})

Here we will be adding the TailwindCSS files

Start a new terminal inside your project folder and run the following command, with the package manager you'd like to use

npm install tailwindcss

pnpm install tailwindcss

yarn add tailwindcss

This file will be used to configure TailwindCSS, and make sure you include in content the relative path to your templates folder

/** @type {import('tailwindcss').Config} */
module.exports = {
  content: ["../templates/**/*.html"],
  theme: {
    extend: {},
  },
  plugins: [],
}

Here we will be adding our custom styles, by creating a new file "styles.css" and adding the base directives

@tailwind base;
@tailwind components;
@tailwind utilities;

This proccess will generate a "app.css" file inside a new "static/css" folder.

The "--watch" flag will make sure that the styles are updated every time you make a change in your files.

npx tailwindcss -i ./styles/app.css -o ../static/css/app.css --watch

Mount the static folder

In order to mount this folder we need to add the following lines to our main.py file

Import the static files

from fastapi.staticfiles import StaticFiles

Add the static folder to your app

app.mount("/static", StaticFiles(directory="static"), name="static")

Now we can add the stylesheet to our base.html file

<link href="{{url_for('static',path='/css/app.css')}}" rel="stylesheet">

In order to serve compressed files we need to import the middleware

from fastapi.middleware.gzip import GZipMiddleware

add the middleware to your app

app.add_middleware(GZipMiddleware)

We can create a script in the package.json file to run the TailwindCSS CLI build process

"scripts": {
    "dev": "npx tailwindcss -i ./styles/app.css -o ../static/css/app.css --watch"
},