EmberJS 对象模型替代调用
2018-01-03 17:13 更新
描述
在替代调用中,可以将一个或多个值传递给计算的属性,而不使用property()方法。这是可能的,因为Ember.js扩展了函数原型。
语句
ComputedPropertyName: Ember.computed('VarName1','VarName1','...','VarNamen', function(){ return VarName; })
例子
<!DOCTYPE html> <html> <head> <title>Emberjs Alternate Invocation</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/javascript"> App = Ember.Application.create(); App.Car = Ember.Object.extend({ CarName: null, CarModel: null, CarYear: null, //defining the computed property function fullDetails fullDetails: Ember.computed('CarName', 'CarModel','CarYear', function(){ return ' Car Name: '+this.get('CarName') + ' Car Model: ' + this.get('CarModel')+' Year: '+this.get('CarYear'); }) }); var car_obj = App.Car.create({ CarName: "Alto", CarModel: "800", CarYear: "2012", }); //get the details of the 'fullDetails' computed property and display them document.write("Full details of the Car:<br>"+car_obj.get('fullDetails')); </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obj_mod_alt_invoc.html文件中
在浏览器中打开此HTML文件。
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