javascript - angular.js 两个指令，第二个不执行

Question

我在 angular.js 模块中定义了两个指令。第一个声明的 HTML 元素执行它的指令，但使用另一个指令的第二个 HTML 元素不执行它。

给定这个 HTML:

<div ng-app="myApp">
  <div ng-controller="PlayersCtrl">
    <div primary text="{{primaryText}}"/>
    <div secondary text="{{secondaryText}}"/>
  </div>
</div>

和这个 angular.js 代码:

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

function PlayersCtrl($scope) {
    $scope.primaryText = "Players";
    $scope.secondaryText = "the best player list";
}

myApp.directive('primary', function(){
  return {
    scope: {
      text: '@'
    },
    template: '<h1>{{text}}</h1>',
    link: function(scope, element, attrs){
      console.log('primary directive');
    }
  };
});

myApp.directive('secondary', function(){
  return {
    scope: {
      text: '@'
    },
    template: '<h3>{{text}}</h3>',
    link: function(scope, element, attrs){
      console.log('secondary directive');
    }
  };
});

生成的 HTML 只是“主要”指令，“次要”指令不呈现:

<div ng-app="myApp" class="ng-scope">
  <div ng-controller="PlayersCtrl" class="ng-scope">
    <div primary="" text="Players" class="ng-isolate-scope ng-scope">
      <h1 class="ng-binding">Players</h1>
    </div>
  </div>
</div>

控制台输出也验证了这一点，因为只输出了“主要指令”文本。

然后如果我切换主要元素和次要元素的顺序，secondary 指令会被执行而primary 指令不会:

<!-- reversed elements -->
<div secondary text="{{secondaryText}}"/>
<div primary text="{{primaryText}}"/>

<!-- renders this HTML (secondary, no primary) -->
<div ng-app="myApp" class="ng-scope">
  <div ng-controller="PlayersCtrl" class="ng-scope">
    <div secondary="" text="the best player list" class="ng-isolate-scope ng-scope">
      <h3 class="ng-binding">the best player list</h3>
    </div>
  </div>
</div>

这是为什么？我做错了什么？

Answer 1

div 不是 void elements并需要一个结束标记。

<div ng-app="myApp">
  <div ng-controller="PlayersCtrl">
    <div primary text="{{primaryText}}"></div>
    <div secondary text="{{secondaryText}}"></div>
  </div>
</div>

Example