Automatically add item to cart checkout.liquid Shopify - https://dylanjh.com/blogs/22-add-a-free-item-to-checkout-automatically-if-price-over-100-shopify

Automatically add item to cart checkout.liquid Shopify - www.dylanjh.com

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
{% assign found_title = false %}
{% for item in checkout.line_items %}
  {% if item.variant.id == 7387208286253 %}
    {% assign found_title = true %}
  {% endif %}
{% endfor %}

{% if checkout.subtotal_price > 10000 and found_title == false %}
<script>
  $( document ).ready(function() {
      var variantId = 7387208286253;
      jQuery.post('/cart/add.js', {
        quantity: 1,
        id: variantId
      });
      setTimeout( 
        function() {
          window.location.reload(true);
        }, 1000);
  });
</script>
{% endif %}