How to modify selected text in Joplin editor

Hey guys, I am encountering some difficulties in developing a plugin as I am a beginner. I am unable to modify the text in the editor using code in the plugin.

I have selected the following text in the editor:

And I want to achieve the following result through a shortcut key:


It is a simple function, but I am unable to implement it. Could you provide me with some guidance? Thank you very much!

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.