在angularjs中的选择框更改时动态更新跨度内部html

Question

我在页面上有多个选择框，每个选择框都有一个列出其价格的范围。 在选择框上，根据物料动态更改价格更新。 我如何使用angularjs做到这一点？

我的以下代码

<div ng-repeat="items in itemsList" class="col-md-3 col-sm-3 ">

    <div class="product product-category">
        <div class="details">
            <img src="resources/images/itemImages/{{items.image}}" style="width:159;height:159;" class="image" />
            <h4 class="name">{{items.name}}<span class="quality">(Quality)</span></h4>
            <h4 class="info">{{items.description}}</h4>
            <select id="unit{{items.id}}" ng-init="itemUnitsSelected = items.itemUnitPrices[0]" ng-model="itemUnitsSelected" ng-change="changedValue(itemUnitsSelected, '{{items.id}}')" data-ng-options="XYZ as XYZ.unit.name for XYZ in items.itemUnitPrices track by XYZ.id " class="form-control item-count">
            </select>
        </div>
        <div class="cart-feature">
            <h5 class="price">
              <span class="rate original"></span>
              <span class="rate  discounted" price="{{items.itemUnitPrices[0].itemPrice}}" id="discountedAmount{{items.id}}">Rs. {{items.itemUnitPrices[0].itemPrice}}</span>
              </h5>
            <div class="cart-option">
                <span class="tag">Qty </span>
                <span class="quantity">
                  <input type="text" value="1" id="qty{{items.id}}" class="form-control" />
                </span>
                <a href="javascript:return;" class="event" ng-click="addItemToCart(items.id,items.name)">
                    <span class="cart-btn"></span>
                </a>
            </div>
        </div>
    </div>

</div>

目前在我的控制器上，我正在通过javascript更新值，我想使用angularjs更改并绑定它。

 $scope.changedValue=function(item,itemId){

    document.getElementById("discountedAmount"+itemId).innerHTML = "Rs. "+item.itemPrice;
    document.getElementById("discountedAmount"+itemId).setAttribute("price", item.itemPrice);
 }; 

Answer 1

itemUnitsSelected应该一定到每个项目ng-repeat通过转换ng-model来item.itemUnitsSelected .The ng-change指令使用的是不应该有{{}}在它插

<select id="unit{{items.id}}" 
  ng-init="item.itemUnitsSelected = items.itemUnitPrices[0]" 
  ng-model="itemUnitsSelected" 
  ng-change="changedValue(itemUnitsSelected, item.id)"
  data-ng-options="XYZ as XYZ.unit.name for XYZ in items.itemUnitPrices track by XYZ.id " 
  class="form-control item-count">
</select>

不要从控制器执行DOM操作，它被视为BAD实践。

你也可以摆脱NG-改变事件的，你只需要纠正你的span标签，重命名items ，以item跨度标签。

<span class="rate  discounted" 
  price="{{item.itemUnitPrices[0].itemPrice}}" 
  id="discountedAmount{{item.id}}">
      Rs. {{item.itemUnitPrices[0].itemPrice}}
</span>