Shopify js form action parsing
<script type="text/javascript">
function get_action() {
form_action = '/collections/all-products/';
var filters_values = '';
var checkboxes = document.querySelectorAll('input[type=checkbox]:checked')
for (var i = 0; i < checkboxes.length; i++)
{
if( checkboxes.length == 1 || i == checkboxes.length - 1 ){
filters_values += checkboxes[i].value;
}else{
filters_values += checkboxes[i].value + '+';
}
checkboxes[i].checked = false;
}
form_action += filters_values;
return form_action;
}
</script>