How to fasten the post styling interface?

Question

Flask

I am writing in Flask a simple site where people can create their posts.
How to add an interface to the creation of posts, with the help of which the user can highlight the text in bold, insert a photo, etc.? Google gives absolutely not what you need.
Preferably without using other technologies.

Answer 1

https://coderoad.ru/35798386/%D0%9A%D0%B0%D0%BA-%D...