CSS filter help

[tanebufton]

I have a website that I am attempting to monitor for stock, however having some issues figuring out how to monitor it, the text on the page stays the same, however the button is changed from being disabled, to being enabled (This is all that changes on the page) - Is there any easy way of alerting if this changes? (I don't seem to be able to monitor the raw HTML

Out of Stock
<button class="add-to-cart btn btn-block btn-container" data-toggle="modal" data-target="#chooseBonusProductModal" data-pid="XXXXXX" data-test-id="add-to-cart-button" disabled=""> <i class="fa fa-shopping-bag"></i> <span class="add-to-cart-text">Add to Cart</span> </button>

In Stock
<button class="add-to-cart btn btn-block btn-container" data-toggle="modal" data-target="#chooseBonusProductModal" data-pid="XXXXX" data-test-id="add-to-cart-button"> <i class="fa fa-shopping-bag"></i> <span class="add-to-cart-text">Add to Cart</span> </button>