check tags in cart line items for Shopify cart page

tag-check-cart.liquid

{% assign isTagAvailable = false %}
{% for item in cart.items %}
{% if item.product.tags contains 'poster' or item.product.tags contains 'frames' %}
   {% assign isTagAvailable = true %}
{% endif %}
{% endfor %}

{% if isTagAvailable  %}
     Add your code here
{% endif %}