Question

我试图改编我在stackoverflow上找到的代码，但不幸的是我没有成功。我要存储一个变量，该变量在刷新页面后将保持不变，直到清除cookie。

在我将向您展示的代码中，按刷新后，变量将重置为0。

为什么？谢谢。

JS：

 <script>
   var WishCounter = 0;
   let localStorage = window.localStorage
   $(document).ready(function(){
          $(".accordion-heading").click(function(){
                if($(".accordion-body").is(':visible')){  /* check the condition accordion-body is visible or not */
                    $(".accordion-body").slideUp(200);  /*if content is visible then close accordion-body with specific time duration */
                  $(".plusminus").text('+')    /* add plus sign */
              }
              else{
                  $(this).next(".accordion-body").slideDown(200); /*if content not visible then
                                                                                                              show the accordion-body */
                  $(this).children(".plusminus").text('-');  /* add minus sign */
              }
          });
          $(".add-to-cart2").click(function(){
              WishCounter++;
              localStorage.setItem('WishCounter', WishCounter);
              $(".cart-wish").text(WishCounter);
              localStorage.getItem('WishCounter');



          });
      });

      </script>

HTML：

<a class="add-to-cart2" role="button" data-toggle="modal">
                <img src="images/popit/wish.png" class="buttons-featured-wish" width="91" height="91" border="0" alt=""></a>

Answer 1

WishCounter始终为0，因为它是在页面加载时设置的。可以通过将WishCounter的值设置为localStorage.getItem();来固定该值（如果有值）

示例：

<script>
    let localStorage = window.localStorage;
    var WishCounter = localStorage.getItem('WishCounter') === null ? 0 : localStorage.getItem('WishCounter');

    $(".cart-wish").text(WishCounter);

    $(document).ready(function(){
        $(".accordion-heading").click(function(){
            if($(".accordion-body").is(':visible')){  /* check the condition accordion-body is visible or not */
                $(".accordion-body").slideUp(200);  /*if content is visible then close accordion-body with specific time duration */
                $(".plusminus").text('+')    /* add plus sign */
            }
            else{
                $(this).next(".accordion-body").slideDown(200); /*if content not visible then
                                                                                                              show the accordion-body */
                $(this).children(".plusminus").text('-');  /* add minus sign */
            }
        });
        $(".add-to-cart2").click(function(){
            WishCounter++;
            localStorage.setItem('WishCounter', WishCounter);
            $(".cart-wish").text(WishCounter);

        });
    });

</script>

会话存储项目购物车

1 个答案: