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EmberJS 模板條件#if
2018-01-03 17:55 更新
描述
#if語(yǔ)句使用布爾表達(dá)式，如果布爾表達(dá)式為真，if語(yǔ)句中的代碼塊將被執(zhí)行，如果為false，則將執(zhí)行else代碼塊。
語(yǔ)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>
輸出
讓我們執(zhí)行以下步驟，看看上面的代碼如何工作：
將上面的代碼保存在tmp_if_condition.html文件中
在瀏覽器中打開此HTML文件。
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