How to disable scroll wheel in Vim

You need to map the various scroll wheel events to <nop>:

:nmap <ScrollWheelUp> <nop>
:nmap <S-ScrollWheelUp> <nop>
:nmap <C-ScrollWheelUp> <nop>
:nmap <ScrollWheelDown> <nop>
:nmap <S-ScrollWheelDown> <nop>
:nmap <C-ScrollWheelDown> <nop>
:nmap <ScrollWheelLeft> <nop>
:nmap <S-ScrollWheelLeft> <nop>
:nmap <C-ScrollWheelLeft> <nop>
:nmap <ScrollWheelRight> <nop>
:nmap <S-ScrollWheelRight> <nop>
:nmap <C-ScrollWheelRight> <nop>

Then copy and paste those lines and change "nmap" to "imap", and then do it again for "vmap".

See:

:help scroll-mouse-wheel
:help <nop>

And if you are unfamiliar with mappings:

:help map.txt

You can unmap these,

   :map <ScrollWheelUp> <C-Y>
   :map <S-ScrollWheelUp> <C-U>
   :map <ScrollWheelDown> <C-E>
   :map <S-ScrollWheelDown> <C-D>

Ref: vimdoc Scrolling with a mouse wheel.

There should also be a single configuration, but I can't seem to locate it at this time.

How to disable scroll wheel in Vim

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