Custom CSS in Bokeh server embedded in Flask Application

[Jonas_Grave_Kristens]

Have you looked at this post:

3.0.0 CSS changes

A couple of ideas but please note that I am by no means an expert in CSS. But it seems that in Bokeh version 3 the change to shadow DOM elements breaks ones old setup. Now it seems you can use stylesheets go style the bk-btn within a shadow DOM. In the example below I use style_btn2 = """.bk-btn { font-family: Arial; font-size: 20px; color: red; border-color: red; background-color: grey; }""" and add that to stylesheets as a list. If you want to use an external css file it becomes…