jquery - AngularJS 中的 Jquery $(this).val() 等价物是什么？如果更新后输入字段为空，如何将输入字段值设置为零？

Question

<script>
$(document).on('change', '.botentry', function () {
    if ($(this).val() == "") {
        $(this).val(0);
    }
});
</script>

我的html代码是

 <tbody id=" tbody_Buid" ng-if="cstate!=''">
    <tr ng-repeat="b in BottomsUpData | filter:{qtr: cqtr, state: cstate} | filter:searchData | orderBy:['-mtmsegment','bizgroup']" style="text-align:center">
      <td><div>{{b.bizgroup}}</div></td>
      <td><div>{{b.mtmsegment}}</div></td>
      <td><div>{{b.family}}</div></td>
      <td><div>{{b.series}}</div></td>
      <td><div>{{b.formfactor}}</div></td>
      <td><div><span ng-if="!b.freeze.m1 || !b.m1.isEdit">{{b.m1.value}}</span><input class="botentry" ng-if="b.freeze.m1 && b.m1.isEdit" ng-model="b.m1.value" ng-blur="buTotCalc()" type="number" /></div></td>
      <td><div><span ng-if="!b.freeze.m2 || !b.m2.isEdit">{{b.m2.value}}</span><input class="botentry" ng-if="b.freeze.m2 && b.m2.isEdit" ng-model="b.m2.value" ng-blur="buTotCalc()" type="number" /></div></td>
      <td><div><span ng-if="!b.freeze.m3 || !b.m3.isEdit">{{b.m3.value}}</span><input class="botentry" ng-if="b.freeze.m3 && b.m3.isEdit" ng-model="b.m3.value" ng-blur="buTotCalc()" type="number" /></div></td>
      <td><div>{{b.m1.value+b.m2.value+b.m3.value}}</div></td>
    </tr>
  </tbody>

我添加此代码是为了避免在输入框中输入空字段，但它不适用于 AngularJs，Jquery 值零不与 angularjs ng-model 绑定(bind)。

Answer 1

在 Angular js 中，您使用 $scope:

You don't update the input, you update the model to which the input is bound.

例如:

您的 html:

<div ng-controller="MyCtrl">
    <input type='text' ng-model='input' ng-click="myFunction('some value')">
</div>

您的 Controller :

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
   $scope.input = 1;
   $scope.myFunction = function(value) {
        $scope.input = value;
  }
}