Shopify安裝GA4完整教學：3 種追蹤方案比較

  // Initialize GTM tag
(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-XXXXXXX');
  


//  analytics.subscribe("all_standard_events", event => {
//    console.log("Event data ", event?.data);
// });

analytics.subscribe("page_viewed", (event) => {
  window.dataLayer.push({
    event: "page_viewed",
    url: event.context.document.location.href,
    page_title: event.context.document.title,
  });
});

analytics.subscribe("checkout_completed", (event) => {
  dataLayer.push({ ecommerce: null });
  const items = event.data?.checkout?.lineItems?.map((item) => {
    return {
      item_id: item.variant.product.id,
      item_name: item.variant.product.title,
      price: item.variant.price.amount,
      quantity: item.quantity
    }
  });
  dataLayer.push({
    event: "purchase",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.checkout?.currencyCode,
      value: event.data?.checkout?.subtotalPrice?.amount,
      transaction_id: event.data?.checkout?.order?.id,
      coupon: event.data?.checkout?.discountAllocations,
      shipping: event.data?.checkout?.shippingLine?.price?.amount,
      tax: event.data?.checkout?.totalTax?.amount,
      items: items
    }
  });
});
analytics.subscribe("payment_info_submitted", (event) => {
  dataLayer.push({ ecommerce: null });
  const items = event.data?.checkout?.lineItems?.map((item) => {
    return {
      item_id: item.variant.product.id,
      item_name: item.variant.product.title,
      price: item.variant.price.amount,
      quantity: item.quantity
    }
  });
  dataLayer.push({
    event: "add_payment_info",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.checkout?.currencyCode,
      value: event.data?.checkout?.subtotalPrice?.amount,
      items: items
    }
  });
});

analytics.subscribe("checkout_shipping_info_submitted", (event) => {
  dataLayer.push({ ecommerce: null });
  const items = event.data?.checkout?.lineItems?.map((item) => {
    return {
      item_id: item.variant.product.id,
      item_name: item.variant.product.title,
      price: item.variant.price.amount,
      quantity: item.quantity
    }
  });
  dataLayer.push({
    event: "add_shipping_info",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.checkout?.currencyCode,
      value: event.data?.checkout?.subtotalPrice?.amount,
      items: items
    }
  });
});

analytics.subscribe("checkout_address_info_submitted", (event) => {
  window.dataLayer.push({
    event: "checkout_address_info_submitted",
    timestamp: event.timestamp,
    id: event.id,
    token: event.data?.checkout?.token,
    url: event.context.document.location.href,
    client_id: event.clientId,
    email: event.data?.checkout?.email,
    phone: event.data?.checkout?.phone,
    first_name: event.data?.checkout?.shippingAddress?.firstName,
    last_name: event.data?.checkout?.shippingAddress?.lastName,
    address1: event.data?.checkout?.shippingAddress?.address1,
    address2: event.data?.checkout?.shippingAddress?.address2,
    city: event.data?.checkout?.shippingAddress?.city,
    country: event.data?.checkout?.shippingAddress?.country,
    countryCode: event.data?.checkout?.shippingAddress?.countryCode,
    province: event.data?.checkout?.shippingAddress?.province,
    provinceCode: event.data?.checkout?.shippingAddress?.provinceCode,
    zip: event.data?.checkout?.shippingAddress?.zip,
    orderId: event.data?.checkout?.order?.id,
    currency: event.data?.checkout?.currencyCode,
    subtotal: event.data?.checkout?.subtotalPrice?.amount,
    shipping: event.data?.checkout?.shippingLine?.price?.amount,
    value: event.data?.checkout?.totalPrice?.amount,
    tax: event.data?.checkout?.totalTax?.amount,
  });
});

analytics.subscribe("checkout_contact_info_submitted", (event) => {
  window.dataLayer.push({
    event: "checkout_contact_info_submitted",
    timestamp: event.timestamp,
    id: event.id,
    token: event.data?.checkout?.token,
    url: event.context.document.location.href,
    client_id: event.clientId,
    email: event.data?.checkout?.email,
    phone: event.data?.checkout?.phone,
    first_name: event.data?.checkout?.shippingAddress?.firstName,
    last_name: event.data?.checkout?.shippingAddress?.lastName,
    address1: event.data?.checkout?.shippingAddress?.address1,
    address2: event.data?.checkout?.shippingAddress?.address2,
    city: event.data?.checkout?.shippingAddress?.city,
    country: event.data?.checkout?.shippingAddress?.country,
    countryCode: event.data?.checkout?.shippingAddress?.countryCode,
    province: event.data?.checkout?.shippingAddress?.province,
    provinceCode: event.data?.checkout?.shippingAddress?.provinceCode,
    zip: event.data?.checkout?.shippingAddress?.zip,
    orderId: event.data?.checkout?.order?.id,
    currency: event.data?.checkout?.currencyCode,
    subtotal: event.data?.checkout?.subtotalPrice?.amount,
    shipping: event.data?.checkout?.shippingLine?.price?.amount,
    value: event.data?.checkout?.totalPrice?.amount,
    tax: event.data?.checkout?.totalTax?.amount,
  });
});
analytics.subscribe("form_submitted", (event) => {
    const emailRegex = /email/i;
    const [email] = event.data.element.elements
    .filter((item) => emailRegex.test(item.id) || emailRegex.test(item.name))
    .map((item) => item.value);
  
    const formDetails = event.data.element.elements.map((item) => {
      return {
        id: item.id,
        name: item.name,
        value: item.value,
      };
    });
  window.dataLayer.push({
    event: "form_submitted",
    timestamp: event.timestamp,
    id: event.data.element.id,
    token: event.data?.checkout?.token,
    url: event.context.document.location.href,
    client_id: event.clientId,
    email: email,
    formDetails: formDetails
  });
});

analytics.subscribe("checkout_started", (event) => {
  dataLayer.push({ ecommerce: null });
  const items = event.data?.checkout?.lineItems?.map((item) => {
    return {
      item_id: item.variant.product.id,
      item_name: item.variant.product.title,
      price: item.variant.price.amount,
      quantity: item.quantity
    }
  });
  dataLayer.push({
    event: "begin_checkout",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.checkout?.currencyCode,
      value: event.data?.checkout?.subtotalPrice?.amount,
      items: items
    }
  });
});

analytics.subscribe("product_added_to_cart", (event) => {
  dataLayer.push({ ecommerce: null });
  dataLayer.push({
    event: "add_to_cart",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.cartLine?.cost?.totalAmount?.currencyCode,
      value: event.data?.cartLine?.cost?.totalAmount?.amount,
      items: [
      {
        item_id: event.data?.cartLine?.merchandise?.product?.id,
        item_name: event.data?.cartLine?.merchandise?.product?.title,
        price: event.data?.cartLine?.merchandise?.price?.amount,
        quantity: event.data?.cartLine?.quantity
      }
      ]
    }
  });
});

analytics.subscribe("cart_viewed", (event) => {
  dataLayer.push({ ecommerce: null });
  const items = event.data?.cart?.lines?.map((item) => {
    return {
      item_id: item.merchandise.product.id,
      item_name: item.merchandise.product.title,
      price: item.merchandise.price.amount,
      quantity: item.quantity
    }
  });
  dataLayer.push({
    event: "view_cart",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.cart?.cost?.totalAmount?.currencyCode,
      value: event.data?.cart?.cost?.totalAmount?.amount,
      items: items
    }
  });
});



analytics.subscribe("product_viewed", (event) => {
  dataLayer.push({ ecommerce: null });
  dataLayer.push({
    event: "view_item",
    url: event.context.document.location.href,
    ecommerce: {
      currency: event.data?.productVariant?.price?.currencyCode,
      value: event.data?.productVariant?.price?.amount,
      items: [
      {
        item_id: event.data?.productVariant?.product?.id,
        item_name: event.data?.productVariant?.product?.title,
        price: event.data?.productVariant?.price?.amount,
        quantity: 1
      }
      ]
    }
  });
});

analytics.subscribe("search_submitted", (event) => {
  window.dataLayer.push({
    event: "search_submitted",
    timestamp: event.timestamp,
    id: event.id,
    client_id: event.clientId,
    url: event.context.document.location.href,
    query: event.data?.searchResult?.query,
  });
});

//analytics.subscribe("collection_viewed", (event) => {
 // window.dataLayer.push({
 //   event: "collection_viewed",
  //  timestamp: event.timestamp,
   // id: event.id,
  //  client_id: event.clientId,
  //  url: event.context.document.location.href,
  //  collection_id: event.data?.collection?.id,
  //  collection_title: event.data?.collection?.title,
 // });
//});