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Editorial Team
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Asked: 2026-06-16T09:57:39+00:00

To ask in a more precise way: is there a function that works like

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To ask in a more precise way: is there a function that works like winnr(), but returns a non-changed value for each window?

I’m trying to use hotkeys to switch between buffers in my vim. It all worked fine. But when I put my cursor in another window like NERDTree’s and press the hotkey, NERDTree just disappear and its window switched to another buffer. To fix this, I think I should enable the hotkeys if only if the cursor is in the first window opened with vim. Is there a function like is_first_window() in vim script？

Thank you.

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1 Answer

  1. Editorial Team

    A window can display any buffer at any time; buffers are not (permanently) attached to particular windows, so there is no such unique ID.

    What you want is a way to distinguish special windows (like those showing NERDTree) from regular buffers. The way to do this is via the buffer name, to be obtained via bufname('%'), as romainl has suggested. Your mapping can contain a list of known names of special buffers (like NERD_tree_1), or you could try to generically check for special windows, as most of them have &buftype == 'nofile'. Many plugins also have their own special marker variables, NERDTree for example allows to check for its window like this:

    echo exists("t:NERDTreeBufName") && bufwinnr(t:NERDTreeBufName) == winnr()
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