Filter by size in stock Shopify step 2

Filter by size in stock Shopify step 2

{% assign sizes = '' %}
{% assign outofstock = false %}
{% for tag in current_tags %}
    {% if tag == 'XS' or tag == 'S' or tag == 'M' or tag == 'L' or tag == 'XL' %}
    {% assign outofstock = true %}
    {% endif %}
{% endfor %}

    {% for variant in product.variants %}
      {% if variant.available %}
        {% assign sizes = sizes | append: variant.options[1] | append: ' ' %}
  	{% if current_tags contains variant.options[1] %}
          {% assign outofstock = false %}
        {% endif %}
      {% endif %}
    {% endfor %}

{% if outofstock == false %}


<!-- INSERT THE PRODUCT GRID HERE -->


{% endif %}