EmberJS 模板条件#if
描述
#if语句使用布尔表达式，如果布尔表达式为真，if语句中的代码块将被执行，如果为false，则将执行else代码块。
语句
<script type="text/x-handlebars"> {{#if booleanExpression}} <!--Blocks--> {{else}} <!--Blocks--> {{/if}} </script>
例子
<!DOCTYPE html> <html> <head> <title>Emberjs if condition</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"> <!-- 'check' is the computed property function which is being invoked as boolean value --> {{#if check}} <!-- true block of statement --> <h3> boolean value is {{check}}</h3> {{else}} <!-- false block of statement --> <h3>boolean value is {{check}}</h3> {{/if}} </script> <script type="text/javascript"> var App = Ember.Application.create() App.ApplicationController = Ember.Controller.extend({ //initialize the boolean value bool: true, check: function(){ //returning the boolean value to the called function return this.bool; }.property('content.check'), }); </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tmp_if_condition.html文件中
在浏览器中打开此HTML文件。