嵌套JavaScript数组中的分隔列表

Question

我有一个包含嵌套数组的简单JavaScript对象。我在这里要做的就是返回一个逗号分隔的列表，其中包含"digitalData.transaction.item.productInfoi.productIDj“中的”productID“值

我很感谢你的帮助。

下面是JS的一个例子(很抱歉篇幅太长，但我想这总比抱歉要好)：

window.digitalData = {
  transaction: {
    purchaseID: "30010819", //Typically the same as transactionID
    transactionID: "30010819", //Unique Identifier for this transaction
    item: [{ //Array of items in this transaction
      productInfo: {
        productID: "63493",
        color: "Fuscia", //color if this product has colors
        size: "M (8-10)", //size if this product has sizes
        sku: "63493-12456", //sku
        inventoryStatus: "In Stock", // Mirror the on-site messaging
        skuAttr: [{ // extensible array of sku attributes and values
          typeLabel: "Color",
          valueCode: "FSA",
          valueLabel: "Fuscia"
        }, {
          typeLabel: "Size",
          valueLabel: "M (8-10)"
        }]
      },
      price: {
        currency: "USD"
      },
      quantity: 1
    }, {
      productInfo: {
        productID: "55027",
        color: "", //color if this product has colors
        size: "", //size if this product has sizes
        sku: "55027", //sku if known. otherwise use productID
        inventoryStatus: "Low Stock", // Mirror the on-site messaging
        skuAttr: [] //Empty array if no sku attributes exist
      },
      price: {
        currency: "USD"
      },
      quantity: 2     
      }]
    }]
  }

Answer 1

你可以这样做：

digitalData.transaction.item.map(x => x.productInfo.productID).join(',')