Backbone模型+集合/ TypeScriptand编译奇怪地编译

Question

我有一个看起来像这样的课程

export class MyClass extends backbone.Model {
    idAttribute: string = "Name";
    private MyProperty: new backbone.Collection<MyCollectionItemClass>();

...

JavaScript中的

：

private MyProperty: new backbone.Collection<MyCollectionItemClass>();

编译成：

_this.MyProperty= ();

给出了：

  

Uncaught SyntaxError：意外的令牌）

刚测过： 如果我删除private

MyProperty: new backbone.Collection<MyCollectionItemClass>();

结果使用相同的代码。

有人要求提供更完整的例子： 打字稿：

import _ = require("underscore");
import backbone = require("backbone");

export class MyClass extends backbone.Model {
    private MyProperty: new backbone.Collection<MyCollectionItemClass>();
}

export class MyCollectionItemClass extends backbone.Model {
}

编译成JavaScript：

var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
define(["require", "exports", "backbone"], function (require, exports, backbone) {
    "use strict";
    exports.__esModule = true;
    var MyClass = (function (_super) {
        __extends(MyClass, _super);
        function MyClass() {
            var _this = _super !== null && _super.apply(this, arguments) || this;
            _this.MyProperty = ();
            return _this;
        }
        return MyClass;
    }(backbone.Model));
    exports.MyClass = MyClass;
    var MyCollectionItemClass = (function (_super) {
        __extends(MyCollectionItemClass, _super);
        function MyCollectionItemClass() {
            return _super !== null && _super.apply(this, arguments) || this;
        }
        return MyCollectionItemClass;
    }(backbone.Model));
    exports.MyCollectionItemClass = MyCollectionItemClass;
});

tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "module": "amd"
  },
  "compileOnSave": true
}