有时候涉及Windows GUI，AHK比js好用。
原地址：https://autohotkey.com/board/topic/80205-display-mouse-coordinates-and-copy-them-if-needed/
#NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
#Warn ; Recommended for catching common errors.
SendMode Input ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir% ; Ensures a consistent starting directory.
; While CapsLock is toggled On
; Script will display Mouse Position (coordinates) as a tooltip at Top-Left corner of screen.
; Also allows to copy them (to clipboard) with a PrintScreen button.
#SingleInstance force ; only one instance of script can run
#Persistent ; to make it run indefinitely
settimer start1, 0 ; "0" to make it update position instantly
return
start1:
if !GetKeyState("capslock","T") ; whether capslock is on or off
{
tooltip ; if off, don't show tooltip at all.
}
else
{ ; if on
CoordMode, ToolTip, Screen ; makes tooltip to appear at position, relative to screen.
CoordMode, Mouse, Screen ; makes mouse coordinates to be relative to screen.
MouseGetPos xx, yy ; get mouse x and y position, store as %xx% and %yy%
tooltip %xx% %yy%, 0, 0 ; display tooltip of %xx% %yy% at coordinates x0 y0.
PrintScreen ; assign new function to PrintScreen. If pressed...
clipboard == %xx% %yy% ; ...store %xx% %yy% to clipboard.
return
}
return