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Here's my thought on 💭 Automatic browser reloading in FastAPI
I just discovered arel for hot reloading python applications when content changes from this snippet that implements it for fatapi.
On app startup add the /hot-reload routes if in DEBUG mode.
import os import arel from fastapi import FastAPI, Request from fastapi.templating import Jinja2Templates app = FastAPI() templates = Jinja2Templates("templates") if _debug := os.getenv("DEBUG"): hot_reload = arel.HotReload(paths=[arel.Path(".")]) app.add_websocket_route("/hot-reload", route=hot_reload, name="hot-reload") app.add_event_handler("startup", hot_reload.startup) app.add_event_handler("shutdown", hot_reload.shutdown) templates.env.globals["DEBUG"] = _debug templates.env.globals["hot_reload"] = hot_reload @app.get("/") def index(request: Request): return templates.TemplateResponse("index.html", context={"request": request}) # run: # DEBUG=true uvicorn main:app --reload
install arel and make sure you have uvicorn[standard] for websocket support.
fastapi uvicorn[standard] arel jinja2
In the template, load the script when in debug mode.
<body> {% block content %}{% endblock %} <!-- Hot reload script --> {% if DEBUG %} {{ hot_reload.script(url_for('hot-reload')) | safe }} {% endif %} </body>
This post was a thought by Waylon Walker see all my thoughts at https://waylonwalker.com/thoughts