自定义 JS 变量来计算购物车中的商品数量

Question

My website pushes the following data to the data layer when a purchase is made

  ecommerce: {
    checkout: {
      actionField: {step: 3, revenue: null},
      products: [
        {
          name: 'Product 1',
          id: 4616,
          price: 516,
          brand: 'Brand Name',
          category: 'Product Type',
          variant: 'Product Version',
          quantity: 1,
          position: 1,
          dimension1: 'Guest',
          dimension2: '',
          dimension3: '',
          metric1: 2
        },
        {
          name: 'Product 2',
          id: 4618,
          price: 400,
          brand: 'Brand Name',
          category: 'Product Type',
          variant: 'Product Version',
          quantity: 1,
          position: 2,
          dimension1: 'Guest',
          dimension2: '',
          dimension3: '',
          metric1: 4
        }
      ]
    }
  }

I want to get the number of items in the basket as a variable in Tag Manager (ie 2 items in cart). I'm trying to adjust Dinesh's solution from here that did something similar for total amount, but it's not working for me:

function(){
  var productList = ecommerce.checkout.products;
  var totalItems = 0;
  for(var i = 0;i<productList.length;i++)
  {
    totalItems+=(productList[i].quantity);
  }
  return totalItems;
}

Not sure what I'm doing wrong.

Answer 1

You already have the answer, just find the length of the products which you are already doing in the for loop, that is the number of products in the basket.

Hope i answered your question