I've been trying to make my button open a new tab, the same way my form is doing but I've discovered that
window.open() doesn't work on POST requests. SO, is there any other way I can make my button open a new tab instead of opening in the parent tab?
I just needed to place the
target="_blank" like so
<form id="annex" method="POST" target="_blank" action="checkbutton/index/display"> <input name='monkey' type="hidden" value="<?= $block->getProduct()->getSku(); ?>"/> <button type="submit" class="action primary tocart" id="checkstores"><?=__('Check Stores')?></button> </form>