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EmberJS 模板修饰符键

2018-01-03 18:55 更新

描述

{{action}}助手将按下修改键来忽略点击事件。allowedKeys选项指定不忽略哪些键。

语句

<button {{action 'anActionName' allowedKeys="alt"}}></button>

例子

<!DOCTYPE html>
<html>
   <head>
      <title>Emberjs Modifier Keys</title>
      <!-- CDN's -->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/3.0.1/handlebars.min.js"></script>
      <script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.10.0/ember.min.js"></script>
      <script src="https://builds.emberjs.com/tags/v1.10.0-beta.3/ember-template-compiler.js"></script>
      <script src="https://builds.emberjs.com/release/ember.debug.js"></script>
      <script src="https://builds.emberjs.com/beta/ember-data.js"></script>
   </head>
   <body>
      <script type="text/x-handlebars">
         <!-- triggering the on event when clicking an alt key -->
         <button {{action 'user' on='click' allowedKeys="alt"}}>Click</button>
         <br/>
         {{#if isShown}}
            {{#each item in model}}
               <h3>{{item}}</h3>
            {{/each}}
         {{/if}}
      </script>

      <script type="text/javascript">
         HelloEmber = Em.Application.create();
         HelloEmber.ApplicationRoute = Em.Route.extend({
            model: function(){
               //return the Data value
               return HelloEmber.Data;
            }
         });
         //assigning the controller
         HelloEmber.ApplicationController = Em.Controller.extend({
            actions: {
               user: function() {
                  this.set('isShown',!this.isShown);
               }
            }
         });
         //creating an array
         HelloEmber.Data=[];
         HelloEmber.Data.push("Welcome to Tutorialspoint");
      </script>
   </body>
</html>

输出

让我们执行以下步骤，看看上面的代码如何工作：

将上面的代码保存在temp_act_mod_key.html文件中
在浏览器中打开此HTML文件。

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