import { getwinposx } from "https://deno.land/x/denops_std@v5.0.2/function/mod.ts";
The result is a Number, which is the X coordinate in pixels of
the left hand side of the GUI Vim window. Also works for an
xterm (uses a timeout of 100 msec).
The result will be -1 if the information is not available.
The value can be used with :winpos.
Parameters
denops: Denops