因此，我试图保存并加载一个包含产品详细信息列表的 cookie，然后将这些产品详细信息显示到页面上。

然而，当我运行这个时，我收到的是一个

ReferenceError: Can't find variable: GetProductPrice

尝试读取我使用 GetProductPrice() 函数存储的 cookie 时。

Cookie 存储程序在网站首次加载时运行。它创建了一个产品列表，我稍后打算将其用作购物车的一部分。然后它应该保存这个 cookie，以便在用户转到不同页面时可以再次访问它。这样，如果用户将商品添加到购物车，购物车变量将不会在以后重置。但是正如我之前所说，这是行不通的。加载和保存 cookie 函数是由其他人在 Stack Overflow 上创建的，并且工作正常。

这是 cookie 保护程序的代码，它应该只在用户第一次访问网站时运行:

function setUpProducts() { //in here we define each of the products when we first start up. This way we know what products the customer has access to.
  setUpPages();
  try {
    hasRun = getCookie('hasRunCookie'); //get the has run cookie from before, or at least try to
  } catch {
    hasRun = 0;
  }
  //if (hasRun != 1){ //only run this the first time, otherwise we dont need to.
  if (hasRun != 1) {
    hasRun = 1;
    createCookie('hasRunCookie', hasRun);
    var dataList = []; //array for holding the raw data
    var nameList = [];
    var priceList = [];
    var amountList = []; //lists for temporrily holding data before it is put in the product list's product objects.
    var set1 = 0; //allows differentiating between different values in the raw data
    var productIds = 0; //product ID to differentiate between products easily

    $.get('../productdata.txt', function(data) { //the text file product data contains all the product infomation so that it can be changed at a moments notice.
      //var fileDom = $(data);

      dataList = data.split("\n");
      $.each(dataList, function(n, elem) {
        $('#myid').append('<div>' + elem + '</div>');
      });
    });

    var i;
    for (i = 0; i < dataList.length; i++) { //this gets the infomation from the text file and loads it into the products
      if (set1 == 0) {
        nameList.push(dataList[i]);
        set1 = 1;
      } else if (set1 == 1) {
        priceList.push(dataList[i]);
        set1 = 0;
      }
    }
    while (productIds != 8) { //make the products, programing counting always starts at 0, so 8 is actually the 9th number.
      var productObject = {
        productID: productIds,
        productName: nameList[productIds],
        productPrice: priceList[productIds],
        purchasedAmount: 0
      };
      productList.push(productObject); //put each product into the product list.
      productIds += 1;
    }
    var json_str = JSON.stringify(productList); //bottle and store our list of products
    createCookie('ProductListCookie', json_str);
    //}

  }

这是用于加载 cookie 并在相关产品页面上显示产品价格的代码:

function GetProductPrice(productIdz) {
  var json_str = getCookie('hasRunCookie');
  productList = JSON.parse(json_str);
  for (i = 0; i < productList.length; i++) {
    if (productList[i].productID == productIdz) {
      productHolder = productList[i];
      document.getElementById("price").innerHTML = productHolder.productPrice;
    }
  }
}

最佳答案

使用localStorage

//Set
localStorage.setItem('ProductListCookie', json_str);

//Get
var json_str = localStorage.getItem('ProductListCookie');

关于javascript - 存储和调用 cookie Javascript 的问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50557862/