它只執(zhí)行錯誤的語句塊。
{{#unless falsy_condition}} <!--Block of statment--> {{/unless}}
<!DOCTYPE html> <html> <head> <title>Emberjs unless 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"> <!-- checks for the false condition and displays the appropriate message --> {{#unless check}} <h3> boolean value is {{check}}</h3> {{/unless}} </script> <script type="text/javascript"> var App = Ember.Application.create() App.ApplicationController = Ember.Controller.extend({ <!-- defining falsy value for the bool --> bool: false, check: function(){ return this.bool; }.property('content.check') }); </script> </body> </html>
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_unless_condition.html文件中
在瀏覽器中打開此HTML文件。
更多建議: