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javascript - 如何在 AngularJS 中綁定自訂事件?


我有一個自訂事件 core-transitionend(實際上是由 Polymer 觸發的),我可以使用 document.addEventListener() 來設定事件處理器。但在 AngularJS 中做到這一點的最佳做法是什麼?

或者,我可以在 DOM 中明確設置一個處理器,即 <paper-ripple on-core-transitionend="enter()"></paper-ripple>,但如何在 AngularJS 中定義這個函數?

答案#1

看看這個 fiddle,這裡我創建了一個自訂指令,將事件綁定到元素上,

angular.module('HelloApp', [])
    .directive('customDir', function () {
        return {
            restrict: 'A',

            link: function(scope, element, attrs)      
            {
                element.bind("click",function()
            {
            alert("you clicked me");

        })
            }    


        }
    })

在你的情況下,你可以簡單地將你定義的事件綁定到該元素上

答案#2

你可以做以下事情:

  1. 將您的自定義元素包裹在 auto-binding 模板中。
  2. 將所有來自 Angular 範圍的處理程序綁定到 Polymer 範圍(模板元素)。

就這樣!

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<link href="https://www.polymer-project.org/components/polymer/polymer.html" rel="import">

<link href="https://www.polymer-project.org/components/paper-button/paper-button.html" rel="import">
<div ng-app="demo-app">
  <div ng-controller="DemoController">
    <template bind-events="clickMe,mouseOver" is="auto-binding">
      <paper-button raised on-tap="{{clickMe}}" on-mouseover="{{mouseOver}}">click me</paper-button>
    </template>
    <pre>
            <code>
            {[{text}]}
            </code>
            </pre>
  </div>
</div>
<script>
  angular.module('demo-app', [])
    .config(function($interpolateProvider) {
      $interpolateProvider.startSymbol('{[{').endSymbol('}]}');
    })
    .directive('bindEvents', function() {
      return {
        restrict: 'A',
        link: function(scope, element, attrs) {
          eventNames = attrs.bindEvents.split(',');
          eventNames.forEach(function(eventName) {
            element[0][eventName] = scope[eventName];
          });
        }
      }
    })
    .controller('DemoController', function($scope) {
      $scope.text = '';
      $scope.clickMe = function() {
        $scope.text += '\nyou clicked me!!';
        $scope.$apply();
      };
      $scope.mouseOver = function() {
        $scope.text += '\nyou hovered me!!';
        $scope.$apply();
      }
    });
</script>

或者如果複製整個範圍不是問題,你可以:

    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
    <link href="https://www.polymer-project.org/components/polymer/polymer.html" rel="import">

    <link href="https://www.polymer-project.org/components/paper-button/paper-button.html" rel="import">
    <div ng-app="demo-app">
      <div ng-controller="DemoController">
        <template bind-angular-scope is="auto-binding">
          <paper-button raised on-tap="{{clickMe}}" on-mouseover="{{mouseOver}}">click me</paper-button>
        </template>
        <pre>
                <code>
                {[{text}]}
                </code>
                </pre>
      </div>
    </div>
    <script>
      angular.module('demo-app', [])
        .config(function($interpolateProvider) {
          $interpolateProvider.startSymbol('{[{').endSymbol('}]}');
        })
        .directive('bindAngularScope', function() {
        	return {
                restrict: 'A',
                link: function(scope, element, attrs) {
                    for(k in scope) {
                    	if (!element[0][k]) {
                    		element[0][k] = scope[k];
                    	}
                    }
                }
            }
        })
        .controller('DemoController', function($scope) {
          $scope.text = '';
          $scope.clickMe = function() {
            $scope.text += '\nyou clicked me!!';
            $scope.$apply();
          };
          $scope.mouseOver = function() {
            $scope.text += '\nyou hovered me!!';
            $scope.$apply();
          }
        });
    </script>

注意: 我不得不更改 Angular 的插值符號才能使它們一起工作。