随笔- 1793 文章- 1 评论- 61 阅读- 298万

How to dynamically load directive into page

https://stackoverflow.com/questions/23556398/how-to-dynamically-load-directive-into-page

I have an html file with a controller and a directive with a template url. I want to load/compile the directive conditionally in the controller:

Controller:

app.controller('TestController', function TestController($http, $scope, $compile) {

$scope.loadData = function (pageId) {
    var pUrl = <some url>
    $http({
        method: 'GET',
        url: pUrl
    }).success(function (data, status) {
        $scope.pData = data;
        var htm = '<test-directive></test-directive>';
        var elm = angular.element("#id").append(htm);
        $compile(elm)($scope);
    }).error(function (data, status) {
        alert('error');
    });
};

$scope.loadData();

});

Directive:

'use strict';

app.directive('testdirective', function ($http) {
var uDirective = {};

uDirective.restrict = 'E';
uDirective.templateUrl = 'js/directives/testdirective.html';
uDirective.controller = function ($scope, $element, $attrs) {
$scope.showDirectiveData();

    $scope.showDirectiveData = function () {
        $scope.directiveDataCollection = <get data>;
    };
};

uDirective.compile = function (element, attributes) {
    // do one-time configuration of element.

    var linkFunction = function ($scope, element, atttributes) {
    };

    return linkFunction;
};

return uDirective;
});

Template used in Directive

<div>
   <div ng-repeat="directiveData in directiveDataCollection">
      <span><h4>{{directiveData.Title}}</h4></span>
   </div>
</div>

How do i get to compile the code in the TestController, load the directive dynamically, and finally load the content and append the content in scope?

--------------------------------------------------------------------------------------------------------------------------------------------------

Here is a general template for you to reference that abstracts and also demonstrates a few Angular concepts:

.directive('parentDirective', function(Resource, $compile){
  return {
    restrict: 'E',
    link: function(scope, elem, attrs){
      Resource.loadData().then(function(result){
        scope.data = result.data;
        var htm = '<child-directive></child-directive>';
        var compiled = $compile(htm)(scope);
        elem.append(compiled);
      });
    }
  }
})
.directive('childDirective', function(){
  return {
    restrict: 'E',
    template: '<div>Content: {{data.key}}</div>'
  }
})
.factory('Resource', function($http){
  var Resource = {};

  Resource.loadData = function(){
    return $http.get('test.json');
  }

  return Resource;
})

HTML

<body ng-app="myApp">
  <parent-directive></parent-directive>
</body>

Notice that there is no controller code. This is because controllers should never manipulate the DOM- one reason is that it will make your code a PITA to test. So, I put everything in directives, where it should probably be in your case as well.

I also moved the $http service into a factory. Anything state/model related should be in a service. Among other reasons, by doing this, you can inject it almost anywhere (including inside of directives) to access your data without worrying about it disappearing when a controller unloads.

EDIT

You should also consider the dissenting view of the dynamic loading approach in general in the accepted answer of Dynamically adding Angular directives

edited May 23 '17 at 12:25