javascript - Angular Directive(指令) : bind 'mouseover' event to an element

Question

在我的 Controller 中，我有以下用户数组，将在部分 html 模板中通过迭代显示

在 Controller 中:

vm.users = [
      {"username": "johnDoe", "address": "Saltlake City, UT", "age": 34},
      {"username": "janeDoe", "address": "Denver, CO", "age": 33},
      {"username": "patrickDoe", "address": "San Francisco, CA", "age": 35}
    ];

部分html代码:

<div ng-repeat="user in mapView.users">
<my-customer info="user"></my-customer></div>

myCustomer 指令: 我希望在客户发生鼠标悬停事件时增加客户的年龄。是否可以在指令中执行此操作？

angular
    .module('angularApp')
    .directive('myCustomer', function() {

  return {
    restrict: 'E',
    link: function(scope, element) {
      element.bind('mouseover', function(e) {
        e.target.age++; // this is not working, need help here!
        console.log(e.target, 'mouseover');
      });
    },
    scope: {
      customerInfo: '=info'
    },

    templateUrl: 'views/directives/myCustomer.html'
  };

}); //myCustomer

我的客户模板:

<span>
  <label class="label-success">Username: {{customerInfo.username}}</label>
</span>
  <span>
    <label class="label-default">{{customerInfo.address}}</label>
  </span>
  <span>
    <label class="label-danger">{{customerInfo.age}}</label>
  </span>

Answer 1

更“有 Angular ”的做事方式是使用 ng-mouseover

你可以把它放在“部分 html” View 中

<my-customer 
    info="user"
    ng-mouseover="user.age = user.age + 1;"></my-customer>

ng-mouseover 在 Angular 上下文中评估表达式。这确保一切都在 Angular 上下文中，您永远不必担心手动触发摘要。

https://docs.angularjs.org/api/ng/directive/ngMouseover

根据@floriban

你也可以把它放在指令模板本身中

<div ng-mouseover="customerInfo.age = customerInfo.age + 1;">
  <span>
    <label class="label-success">Username: {{customerInfo.username}}</label>
  </span>
  <span>
    <label class="label-default">{{customerInfo.address}}</label>
  </span>
  <span>
    <label class="label-danger">{{customerInfo.age}}</label>
  </span>
</div>