Toggle Caps Lock light on macOS Catalina from a shell scripts/terminal

capstoggle.sh

#!/usr/bin/osascript -l JavaScript
# Usage: capstoggle.sh [1 or 0, defaulting to 0]
#      Pass in "1" to turn caps lock on.  By default it turns caps lock off (0)
#
# Make this an executable shell script by running `chmod +x capstoggle.sh`
# Then `./capstoggle.sh 1` to turn caps lock on, and hence toggle the caps lock keyboard light!
# You can make your caps lock light flash 5 times by running this
#    for i in {0..5}; do ./capstoggle.sh 1; ./capstoggle.sh 0; done

ObjC.import("IOKit");
ObjC.import("CoreServices");



var capsState;

function run(argv) {
   capsState = argv[0] == '1'?1:0;
   console.log("Setting caplock:",capsState);

    (() => {
        var ioConnect = Ref();
        var state = Ref();

        $.IOServiceOpen(
            $.IOServiceGetMatchingService(
                $.kIOMasterPortDefault,
                $.IOServiceMatching(
                    $.kIOHIDSystemClass
                )
            ),
            $.mach_task_self_,
            $.kIOHIDParamConnectType,
            ioConnect
        );
        $.IOHIDSetModifierLockState(ioConnect, $.kIOHIDCapsLockState, capsState);
        
        // The code below is supposed to get the current capslock state, but it never works for me
        // state[0] is always false... I think it broke in Catalina.
        // $.IOHIDGetModifierLockState(ioConnect, $.kIOHIDCapsLockState, state);
        // console.log("--->", state[0]); 

        $.IOServiceClose(ioConnect);
    })();


}

Got the same problem here

state always returns false