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vrslev/main.py

Last active November 3, 2024 15:35
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Automatic browser reloading in FastAPI
Raw
main.py
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
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requirements.txt
fastapi
uvicorn[standard]
arel
jinja2
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templates-base.html
<body>
{% block content %}{% endblock %}
<!-- Hot reload script -->
{% if DEBUG %} {{ hot_reload.script(url_for('hot-reload')) | safe }} {% endif
%}
</body>
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templates-index.html
{% extends "base.html" %} {% block content %} Hello, world! {% endblock %}
@vrslev
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vrslev commented Dec 20, 2023

It works in Safari (Version 17.2 (19617.1.17.11.9)) just fine.

@yanky2000 Just tested it in Safari 17.1—it also works. Removed the comment, thanks.

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