Arming Multiple MIDI/Instrument Tracks

So in Pro Tools, in order to arm multiple instrument/midi tracks at the same time you must hold shift while clicking clicking each track otherwise they toggle by default. I am trying to do this via code but it's not working. Any help would be appreciated.

function trackToggleArm(trackName) {
var track = sf.ui.proTools.trackGetByName({ name: trackName }).track;
var inputBtn = track.buttons.whoseTitle.is('Track Record Enable').first;
inputBtn.elementClick();

}

sf.keyboard.modifiers({
isShift: true
});

trackToggleArm('GR Controller');
trackToggleArm('Keys MIDI');
trackToggleArm('eDrums MIDI');

sf.keyboard.modifiers();