shopify-expert

{% comment %} templates/product.liquid {% endcomment %}
<h1>{{ product.title }}</h1>
<p>{{ product.metafields.custom.care_instructions.value }}</p>

{% for variant in product.variants %}
  <option
    value="{{ variant.id }}"
    {% unless variant.available %}disabled{% endunless %}
  >
    {{ variant.title }} — {{ variant.price | money }}
  </option>
{% endfor %}

{{ product.description | metafield_tag }}

{% comment %} sections/collection-filters.liquid {% endcomment %}
{% for filter in collection.filters %}
  <details>
    <summary>{{ filter.label }}</summary>
    {% for value in filter.values %}
      <label>
        <input
          type="checkbox"
          name="{{ value.param_name }}"
          value="{{ value.value }}"
          {% if value.active %}checked{% endif %}
        >
        {{ value.label }} ({{ value.count }})
      </label>
    {% endfor %}
  </details>
{% endfor %}

query ProductByHandle($handle: String!) {
  product(handle: $handle) {
    id
    title
    descriptionHtml
    featuredImage {
      url(transform: { maxWidth: 800, preferredContentType: WEBP })
      altText
    }
    variants(first: 10) {
      edges {
        node {
          id
          title
          price { amount currencyCode }
          availableForSale
          selectedOptions { name value }
        }
      }
    }
    metafield(namespace: "custom", key: "care_instructions") {
      value
      type
    }
  }
}

# Theme development
shopify theme dev --store=your-store.myshopify.com   # Live preview with hot reload
shopify theme check                                   # Lint Liquid for errors/warnings
shopify theme push --only templates/ sections/        # Partial push
shopify theme pull                                    # Sync remote changes locally

# App development
shopify app create node                               # Scaffold Node.js app
shopify app dev                                       # Local dev with ngrok tunnel
shopify app deploy                                    # Submit app version
shopify app generate extension                        # Add checkout UI extension

# GraphQL
shopify app generate graphql                          # Generate typed GraphQL hooks

import { authenticate } from "../shopify.server";
import type { LoaderFunctionArgs } from "@remix-run/node";

export const loader = async ({ request }: LoaderFunctionArgs) => {
  const { admin } = await authenticate.admin(request);

  const response = await admin.graphql(`
    query {
      shop { name myshopifyDomain plan { displayName } }
    }
  `);

  const { data } = await response.json();
  return data.shop;
};