Shopify Index Section -- Flickity Collection Slider

index--flickity-collection.liquid

{% comment %}
  * Make sure you have the Flickity plugin installed and the proper license for this to function on your store
  * Plugin, licensing and documentation at https://flickity.metafizzy.co/
{% endcomment %}

{% assign collection_main = collections[section.settings.collection_main] %}
{% assign collection_limit = section.settings.collection_limit %}

{% assign cell_align = section.settings.cell_align %}
{% assign wrap_around = section.settings.wrap_around %}
{% assign img_width = section.settings.img_width | append: 'x' %}

<div class="flickity-section-{{ section.id }} flickity-index-slider collection" style="background-color: {{ section.settings.bg }}">
  <div class="page-width">
    <div>
      <p class="text-title text-center" style="margin-bottom:{{ section.settings.title_mb }}px">{{ section.settings.title }}</p>
    </div>
    <div class="flickity-section__carousel carousel-{{section.id }} text-center"
        data-flickity='{
          "cellAlign": "{{ cell_align }}",
          "pageDots": false,
          "freeScroll": true,
          "contain": true,
          "wrapAround": {{ wrap_around }}
        }'>

      {% for product in collection_main.products limit: collection_limit %}
        {% assign first_variant = product.selected_or_first_available_variant %}
        {% assign featured_img_src = first_variant.featured_img.src | default: product.featured_image.src %}
        {% assign price = first_variant.price %}
        {% assign compare_at_price = first_variant.compare_at_price %}
        <div class="carousel__cell" style="width:{{ section.settings.cell_width }};margin-right:{{ section.settings.mr }}px">
            <a href="{{ product.url }}">
              <img src="{{ featured_img_src | img_url: img_width }}" alt="{{ product.featured_img.alt }}" />
            </a>
          <a href="{{ product.url }}">
            <h5>{{ product.title }}</h5>
          </a>
          {% if compare_at_price > price %}
            <s class="product__compare-at-price">{{ compare_at_price | money }}</s>
            <p class="product__product-price">{{ price | money }}</p>
          {% else %}
            <p class="product__product-price">{{ price | money }}</p>
          {% endif %}
        </div>
      {% endfor %}
      {% comment %}
      {% for block in section.blocks %}
        {% assign block_product = all_products[block.settings.featured_product] %}
        {% assign block_first_variant = block_product.selected_or_first_available_variant %}
        {% assign featured_img_src = block_first_variant.featured_img.src | default: block_product.featured_image.src %}
        {% assign price = block_first_variant.price %}
        {% assign compare_at_price = block_first_variant.compare_at_price %}
        <div class="carousel__cell" style="width:{{ section.settings.cell_width }};margin-right:{{ section.settings.mr }}px">
          {% if block.settings.featured_product != blank %}
            <a href="{{ block_product.url }}">
              <img src="{{ featured_img_src | img_url: img_width }}" alt="{{ block_product.featured_img.alt }}" />
            </a>
          {% else %}
            {{ 'product-1' | placeholder_svg_tag: 'placeholder-svg' }}
          {% endif %}
          <a href="{{ block_product.url }}">
            <h5>{{ block_product.title }}</h5>
          </a>
          {% if compare_at_price > price %}
            <s class="block-product__compare-at-price">{{ compare_at_price | money }}</s>
            <p class="block-product__product-price">{{ price | money }}</p>
          {% else %}
            <p class="block-product__product-price">{{ price | money }}</p>
          {% endif %}
        </div>
      {% endfor %}
      {% endcomment %}
    </div>
  </div>
</div>

{% schema %}
  {
    "name": "Flickity Product Section",
    "settings": [
      {
        "type": "collection",
        "id": "collection_main",
        "label": "Choose a Collection"
      },
      {
        "type": "range",
        "id": "collection_limit",
        "min": 2,
        "max": 50,
        "step": 1,
        "unit": ".",
        "label": "How many products to show",
        "default": 4
      },
      {
        "type": "color",
        "id": "bg",
        "label": "Background Color"
      },
      {
        "type": "text",
        "id": "title",
        "label": "Title",
        "default": "Flickity Collection Slider"
      },
      {
        "type": "range",
        "id": "img_width",
        "min": 200,
        "max": 600,
        "step": 5,
        "unit": "px",
        "label": "Image Width",
        "default": 200
      },
      {
        "type": "select",
        "id": "cell_align",
        "label": "Slide Alignment",
        "options": [
          {
            "value": "center",
            "label": "Center"
          },
          {
            "value": "left",
            "label": "Left"
          }
        ],
        "default": "center"
      },
      {
        "type": "range",
        "id": "title_mb",
        "min": 30,
        "max": 120,
        "step": 1,
        "unit": "px",
        "label": "Title Margin Bottom",
        "default": 48
      },
      {
        "type": "select",
        "id": "cell_width",
        "label": "Choose number of slides to show on start",
        "options": [
          {
            "value": "25%",
            "label": "Four"
          },
          {
            "value": "20%",
            "label": "Five"
          },
          {
            "value": "16.6666667%",
            "label": "Six"
          },
          {
            "value": "12.5%",
            "label": "Eight"
          }
        ],
        "default": "25%"
      },
      {
        "type": "radio",
        "id": "wrap_around",
        "label": "Enable Wrap Around (endless scrolling)",
        "options": [
          {
            "value": "true",
            "label": "True"
          },
          {
            "value": "false",
            "label": "False"
          }
        ],
        "default": "true"
      },
      {
        "type": "range",
        "id": "mr",
        "min": 0,
        "max": 48,
        "step": 1,
        "unit": "px",
        "label": "Cell Margin Right",
        "default": 16,
        "info": "Save page to see changes."
      }
    ],
    "presets": [
      {
        "name": "Flickity Section",
        "category": "Slider",
      }
    ]
  }
{% endschema %}

The JSON is mal-formed. It has an extra comma after "category": "Slider",

Code won't work as-is.