buyx-cart-submit.html

Quantity field:
After {{ item.variant.id }} and value="{{ item.quantity }}", add the following:

{% unless item.variant.inventory_management == blank or item.variant.inventory_policy == 'continue' %} max="{{ item.variant.inventory_quantity }}" {% endunless %}


At the end of cart.liquid, add

<script>
    jQuery('[max]').change(function() {
      var max = parseInt(jQuery(this).attr('max'), 10);
      if (isNaN(max)) {
        return
      }
      var value = parseInt(jQuery(this).val(), 10) || 0;
      if (value > max) { jQuery(this).val(max); }
    });
    /* change won't trigger on initial load */
    jQuery('[max]').each(function() {
      var max = parseInt(jQuery(this).attr('max'), 10);
      if (isNaN(max)) {
        return
      }
      var value = parseInt(jQuery(this).val(), 10) || 0;
      if (value > max) { jQuery(this).val(max); }
    });
  if (typeof BuyXSubmit == "function") {
    var buyx_checkout_selectors = ["input[name='checkout']", "button[name='checkout']", "input[name='goto_pp']", "button[name='goto_pp']", "input[name='goto_gc']", "button[name='goto_gc']", "[href$='checkout']", ".google-wallet-button-holder", ".amazon-payments-pay-button"];
    window.buyx_cart_global = {{ cart | json }}
    buyx_checkout_selectors.forEach(function(selector) {
        jQuery(selector).bind("click", function() {
          console.log("click")
            return BuyXSubmit(window.buyx_cart_global, "updates_{key}");
            //use appropriate selector for your theme, e.g. "input[data-id={variant_id}]"
        })
    });
  }
</script>

<style>
.buyx-msg {
  color: #F45B4F;
  font-weight: bold;
  font-size: 18px;
  width: 100%;
  text-align: center;
  margin-bottom: 10px;
}
/*
.buyx-msg a {
  color: #000000;
  text-decoration: underline;
}
*/
.buyx-msg:empty {
  display: none;
}
</style>




If the cart doesn't have an Update button, add it with
<input type="submit" id="update-cart" class="btn" name="update" value="Update Cart" />