GSAP 3.5.1 ( latest version ) is now included in Storyline 360

I used the gsap hitTest but it's not working. I'm sure I'm doing something wrong. I first set the targetElement and hammerElement positions when the timeline begins:

var targetElement = document.querySelectorAll("[data-acc-text='targetBox']")

var hammerElement = document.querySelectorAll("[data-acc-text='hammer01']")

gsap.set(targetElement, {x:500, y:200});
gsap.set(hammerElement, {x:500, y:800});

and then I call this when user hits up key:

var hammerElement = document.querySelectorAll("[data-acc-text='hammer01']")

var targetElement = document.querySelectorAll("[data-acc-text='targetBox']")

gsap.to(hammerElement, .25,{y:"-=200", onUpdate:checkHit});

function checkHit() {
if (Draggable.hitTest(hammerElement, targetElement)){
gsap.set(targetElement, {x:500, y:100});
}
}

The hammerElement moves as it should but the function isn't working.