javascript - 从 ng-repeat oddity 内部的 ng-click 访问事件对象

Question

http://jsfiddle.net/5mbdgau1/3/

在我的 fiddle 示例中，我访问了通过 ng-click 传入的事件对象。它工作正常，虽然在处理来自“OtherService”的 promise 时访问它时它突然不存在了？这是怎么回事？

使用 jQuery 是可行的，所以我认为这与 Angular jQlite 有关。此外，它会在 ng-repeat 内部中断，否则它会起作用。我想知道为什么事件对象似乎消失了。谢谢。

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

myApp.controller('TestController', function(TestService) {
  var vm = this;

  vm.foo = TestService;
  vm.items = [1, 2, 3, 4];
});

myApp.service('OtherService', function($http) {
  return $http.get('https://httpbin.org/get').then(function() {});
});

myApp.service('TestService', function(OtherService) {
  return function(evt) {
    var myText = evt.currentTarget.textContent;
    evt.currentTarget.textContent = "Bar";
    OtherService.then(function() {
      console.log(evt);
      evt.currentTarget.textContent =  myText + myText;
    });
  }
});

html:

<div ng-controller="TestController as vm">
  <div ng-repeat="item in vm.items">
      <div ng-click="vm.foo(item, $event)">{{item}}</div>
  </div>
</div>

Answer 1

您以错误的顺序从 ng-click 传递参数。从

更改 ng-click

<div ng-click="vm.foo(item, $event)">{{item}}</div>

到

<div ng-click="vm.foo($event, item)">{{item}}</div>

您的 TestService 函数首先需要一个事件对象。

// Code goes here
var myApp = angular.module('myApp',[]);

myApp.controller('TestController', function(TestService) {
  var vm = this;
  
  vm.foo = TestService;
  vm.items = [1, 2, 3, 4];
});

myApp.service('OtherService', function($http) {
  return $http.get('https://httpbin.org/get').then(function() {});
});

myApp.service('TestService', function(OtherService) {
  return function(item, evt) {
  console.log(evt, item)
    var myText = evt.currentTarget.textContent;
    evt.currentTarget.textContent = "Bar";
    OtherService.then(function() {
      console.log(evt);
      evt.currentTarget.textContent =  myText + myText;
    });
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="myApp" ng-controller="TestController as vm">
  <div ng-repeat="item in vm.items">
      <div ng-click="vm.foo(item, $event)">{{item}}</div>
  </div>
</div>