[Answered ]-How to connect flutter Web_socket_channel package with Django Channels?

you don’t need JS code and html template.
you should change your flutter code like this if you are using local host to run your server:

final channel = IOWebSocketChannel.connect('ws://127.0.0.1:8000/ws/chat/hello/');

dont forget to change your ALLOWED_HOSTS in settings.py in your django project. you can change it like this:

ALLOWED_HOSTS = ['*']

if 127.0.0.1 doesnt work use 10.0.2.2 instead of that