Snippet doesn’t work

I’m trying to add this java code to the footer of a single product page, to hide some variation options but it doesn’t work.

Can you please help?

document
.querySelectorAll('[data-attribute_value]')[2].addEventListener('click', function () {
document.getElementsByClassName('subscription-option')[0].style.display =
'none'
document.getElementsByClassName('subscription-option')[1].style.display =
'none'
})