官术网_书友最值得收藏!

首頁 >

AngularJS Directives Cookbook

Loading external templates for best practices

Thinking in terms of best practices, let's see how to use the same modal directive with an external template, using the templateUrl property instead of the template property. Before we go further, let's explore the two ways to use templates.

Use the script tag of ng-template, as shown in the following example:

<body ng-app='SimpleModal'>
  <script type="text/ng-template" id="modal.html">
  <div ng-show='show'>
    <div class='modal-overlay' ng-click='hideModal()'></div>
    <div class='modal-background' ng-style='windowStyle'>
      <div class='modal-close' ng-click='hideModal()'>X</div>
      <div class='modal-content' ng-transclude></div>
    </div>
  </div>
  </script>
</body>

Alternatively, place the HTML content in a separate file; in this case, the template will be an external file, not just external from the directive code. The code is as follows:

<body ng-app='SimpleModal'>
  <div ng-controller='ModalCtrl'>
    <button ng-click='toggleModal()'>Open Modal</button>
    <modal-window show='modalShown' width='400px' height='60%'>
      <p>Hello Simple Modal Window with External Template<p>
    </modal-window>
  </div>
</body>

Both ways have the same result, and we will see the difference later. For now, let's focus on the HTML template.

Getting ready

For this recipe, we will be using the same code base as the previous recipe.

How to do it…

  1. Let's replace the entire template string with the following code: 
    // loading external templates
app = angular.module('SimpleModal', []);

app.directive('modalWindow', function() {
  return {
    restrict: 'E',
    scope: {
      show: '='
    },
    replace: true, // Replace with template
    transclude: true, // To use custom content
    link: function(scope, element, attrs) {

      scope.windowStyle = {};

      if (attrs.width) {
        scope.windowStyle.width = attrs.width;
      }
      if (attrs.height) {
        scope.windowStyle.height = attrs.height;
      }

      scope.hideModal = function() {
        scope.show = false;
      };
    },
    templateUrl: "modal.html"
  };
});
  2. Remember that we keep the same controller code as the previous example. The templateUrl property points to an external file, so place the following code in a blank HTML file and save it as modal.html: 
    <body ng-app='SimpleModal'>
  <div ng-controller='ModalCtrl'>
    <button ng-click='toggleModal()'>Open Modal</button>
    <modal-window show='modalShown' width='400px' height='60%'>
      <p>Hello Simple Modal Window with External Template<p>
    </modal-window>
  </div>
</body>

How it works…

With the templateUrl property, we can load an external HTML template inside our current HTML file. It is very useful to use this practice because we can reuse the same template in different places in the application. We will cover this topic later on in this book.

Tip

To load external templates inside your files, you must have a HTTP server.

There's more…

When we use type=text/ng-template with the script tag, we need to place the modal content inside our page, and the content will be hidden by the browser. The script tag is used to tell the browser that there is a code snippet, usually in JavaScript. In this way, the content of the tag is interpreted differently by the browser. In our case, the type attribute indicates that we have a template, as we can see in the previous example.

We can use the same example, as shown in the following code:

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.x/angular.js"></script>
<title>Modal Window Directive</title>
<style>
...
</style>
</head>
<body ng-app='SimpleModal'>
  <script type="text/ng-template" id="modal.html">
    <div ng-controller='ModalCtrl'>
      <button ng-click='toggleModal()'>Open Modal</button>
      <modal-window show='modalShown' width='400px' height='60%'>
        <p>Hello Simple Modal Window using ng-template<p>
      </modal-window>
    </div>
  </script>
</body>
</html>

See also

主站蜘蛛池模板： 平山县| 安福县| 温泉县| 鲜城| 河间市| 东兰县| 宜城市| 平度市| 庆元县| 黄龙县| 沅陵县| 彭泽县| 柳河县| 惠安县| 江山市| 蒙阴县| 临洮县| 改则县| 信丰县| 广南县| 东方市| 台安县| 德保县| 楚雄市| 文水县| 东山县| 独山县| 浮山县| 囊谦县| 南木林县| 思茅市| 连平县| 含山县| 河西区| 普兰店市| 遵义县| 邹平县| 海南省| 雷山县| 祁阳县| 甘肃省|