Bootstrap with Flask
You need to create templates and static folders in your project folder, put all .html files in templates folder and all other files (CSS, JS, JPG, etc) in static folder and then in your html file use url_for to load the static files, instead of the default HTML way.
This is a sample project structure:
-project app.py - templates index.html -static -css style.css -js example.js -img example.jpg- You can also use custom folders and structure but you need to define them while creating the application instance Docs
The answer by @mohammad-amin is useful for the directory structuring, but I needed an example of how to use url_for within HTML. With his example structure and files, you can load style.css like this:
<html> <head> <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}"> </head> <body> </body></html>
You can install Flask's Bootstrap dependency with pip install flask-bootstrap in your terminal. However, using flask-bootstrap can limit the control you have over the styling and design of your website.
It also has documentation here, and for the documentation specific to flask-bootstrap, go here.
Flask Bootstrap works well with flask-wtf and navbars. I am currently looking for a way to make pages styled with flask-bootstrap responsive, as it is not very easy to implement in my experience.