Script that updates images on the cart page to show the correct thumbnail as chosen in the Variant Images app.

variant-images-in-cart.html

{% if cart.item_count > 0 %}
<script>
// Script that updates images on the cart page to show the correct thumbnail as chosen in the Variant Images app.
// This works with any markup.
// This works when using Line Item Properties where several items in the cart form can share the same variant ID.
// Author: Caroline Schnapp.
// Place at the top of your cart.liquid template.
(function($) { 
  var variantImages = {},
    productHandles = [];
  {% for item in cart.items %}
  productHandles.push('{{ item.product.handle }}');
  productHandles = $.unique(productHandles);
  if (typeof variantImages[{{ item.id | json }}] === 'undefined') {
    variantImages[{{ item.id | json }}] = [];
  }
  variantImages[{{ item.id | json }}].push({{ forloop.index0 }});
  {% endfor %}
  jQuery(function($) {
    $('form[action="/cart"]').each(function() {
      var images = $(this).find('img[src*="/products/"]').hide();
      var size = images.first().attr('src').match(/thumb|small|compact|medium|large|grande/)[0] || 'small';
      for (var i=0;i<productHandles.length;i++){
        $.getJSON("/a/variant-images-1?shop=" + Shopify.shop + "&handle=" + productHandles[i], function(data){
          $.each(data, function(variantId, image) {
            if (typeof variantImages[variantId] !== 'undefined') {
              for (var j=0; j<variantImages[variantId].length;j++) {
                var oldURLParts = images.eq(variantImages[variantId][j]).attr('src').split('?');
                var suffix = '?' + oldURLParts[1];
                var prefix = oldURLParts[0].split('/');
                prefix.pop();
                prefix = prefix.join('/') + '/';
                var filename = image.filename.replace('.', '_' + size + '.');
                images.eq(variantImages[variantId][j]).attr('src', prefix + filename + suffix).show();
              };
            }              
          });    
        });
      }      
    });
  });
})(jQuery);
</script> 
{% endif %}

Hi Justin,

There's only one theme that does not use jQuery in the theme store, and it is ClearFlex. I am glad you figured it out. For others, if you have ClearFlex, simply add this at the top of your code:

{{ '//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js' | script_tag }}

The snippet has now been fixed to work in the Simple theme, which contains 2 cart forms. The previous code was only updating the images in the drawer cart when on the cart page. Include the code snippet on all pages to deal with the cart drawer, BUT when adding an item to the cart, you won't be able to see the right image, unless you execute the code again. The images will correctly be shown after a page refresh.

Awesome snippet! Thank you so much :)

One thing I noticed, is that it doesn't work when the filename has a period/full stop in it, e.g. 'my.car.jpg'.
It ends up replacing the first period with the size. I changed the filename line to this to help with that:

var posOfLastPeriod = image.filename.lastIndexOf('.');
var filename = image.filename.substr(0, posOfLastPeriod) + '_' + size + image.filename.substr(posOfLastPeriod);

Just popping it here in case it helps somebody else.

Does this still work?

The ajax

$.getJSON("/a/variant-images-1?shop=" + Shopify.shop + "&handle=" + productHandles[i], ...

return 404 for me.

I actually managed to change the product featured image shown on cart page with the variant image by editing the code in cart-template.liquid
Search for image: item.product.featured_media.preview_image and replace with image: item.variant.featured_media.preview_image

I am still checking where can I do the same trick on the mini side cart.