在替代調(diào)用中,可以將一個或多個值傳遞給計算的屬性,而不使用property()方法。這是可能的,因為Ember.js擴(kuò)展了函數(shù)原型。
ComputedPropertyName: Ember.computed('VarName1','VarName1','...','VarNamen', function(){ return VarName; })
<!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>
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obj_mod_alt_invoc.html文件中
在瀏覽器中打開此HTML文件。
更多建議: