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I want to set some options on a particular window number. What I've been doing is go to the window by {winnr} wincmd w, set some options and do some work then come back. But this creates a UI flash (you can see you changed window for a short amount of time).

Is there any way to modify window options without going there programmatically?

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The function setwinvar can change options using the & syntax:

call setwinvar(1, "&list", 0)

You can execute any code in the context of another window using win_execute (vim only):

call win_execute(winid, 'set syntax=python')

In neovim there is also nvim_win_set_option

call nvim_win_set_option(win, 'list', 0)
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  • Thanks. I don't see a win_execute help? I'm using nvim 0.5.0.
    – Rui Liu
    Mar 22 '20 at 14:51
  • Also is it possible to create a window without go to it?
    – Rui Liu
    Mar 22 '20 at 14:51
  • win_execute is vim only, not in neovim. And I don't know of a way to create a window without changing cursor to the window.
    – Mass
    Mar 22 '20 at 15:06
  • Alright I see. Missing win_execute is quite inconvenient... Another similar question: Is there a way to clear the buffer with given buffer number without going to the buffer? I was using 1,$ delete but that deletes what's in the current buffer. I'm looking for something akin to setbufline?
    – Rui Liu
    Mar 22 '20 at 15:32
  • deletebufline(), but consider asking a new question
    – Mass
    Mar 22 '20 at 15:51

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