Question

我正在尝试建立一个函数，当在inputs中更改两个.item时计算总数。我希望仅在每个inputs上的.item上发生这种情况，但是目前，我对{{1 }}

calculateTotal()

.item

keyup

Answer 1

使用item.find(".totalprice").text(total)

function calculateTotal() {
  $(".item").each(function() {
    var item = $(this);
    var qty = item.find(".qty").val();
    var price = item.find(".cost").val();
    var total = Number(qty) * Number(price);
    item.find(".totalprice").text(total)
    
  });
}
calculateTotal();
$(document).keyup('.input--item',function() {
  calculateTotal();
});

.item {
  display: flex;
  align-items: center;
}

.wrap {
  border: 2px solid #eee;
  display: flex;
  flex-direction: column
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="item">
  <div class="wrap">
    Cost:
    <div class="edit">
      <input class="input--item qty" type="text" name="name" autocomplete="off" value="12" maxlength="3" />
    </div>
    Price:
    <div class="edit">
      <input class="input--item cost" type="text" name="name" autocomplete="off" value="55" maxlength="4" />
    </div>
  </div>
 <span class="totalprice"></span><br>
</div>
<div class="item">
  <div class="wrap">
    Cost:
    <div class="edit">
      <input class="input--item qty" type="text" name="name" autocomplete="off" value="40" />
    </div>
    Price:
    <div class="edit">
      <input class="input--item cost" type="text" name="name" autocomplete="off" value="79" />
    </div>
  </div>
  <span class="totalprice"></span><br>
</div>

Answer 2

这里您要更改所有div的文本，而必须更改当前项目的div，就像这样

function calculateTotal() {
  $(".item").each(function() {
    var item = $(this);
    var qty = item.find(".qty").val();
    var price = item.find(".cost").val();
    var total = Number(qty) * Number(price);
    $(this).find(".totalprice").text(total);
  });
}

calculateTotal();
$(".input--item").on("input",function() {
  calculateTotal();
});

.item {
  display: flex;
  align-items: center;
}

.wrap {
  border: 2px solid #eee;
  display: flex;
  flex-direction: column
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="item">
  <div class="wrap">
    Cost:
    <div class="edit">
      <input class="input--item qty" type="text" name="name" autocomplete="off" value="12" maxlength="3" />
    </div>
    Price:
    <div class="edit">
      <input class="input--item cost" type="text" name="name" autocomplete="off" value="55" maxlength="4" />
    </div>
  </div>
  <span class="totalprice"></span><br>
</div>
<div class="item">
  <div class="wrap">
    Cost:
    <div class="edit">
      <input class="input--item qty" type="text" name="name" autocomplete="off" value="40" />
    </div>
    Price:
    <div class="edit">
      <input class="input--item cost" type="text" name="name" autocomplete="off" value="79" />
    </div>
  </div>
  <span class="totalprice"></span><br>
</div>

jQuery-在函数内部使用.each（）

2 个答案: