How do i create a sidebar without any extensions?

HOW DO I CREATE A SIDEBAR WITHOUT ANY EXTENSIONS? I have tried many times with extension but my app crashed.I was trying to create a sidebar without extension and i messed it up and had to delete every thing

Here is one way (not exactly a sidebar, but next best thing)

Who Needs a Sidebar Anyway ?

There is also this little popup menu extension:
Popup Menu Extension by DevYB

or the Dialog Anything Extension by Zhangzqs


current sidebar extension favourite:

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Maybe this can help you too :

Or this tutorial