学习TypeScript 模块

模块是在其自身的作用域里执行，并不是在全局作用域，定义在模块里面的变量、函数和类等在模块外部是不可见的，除非明确地使用 export 导出它们。

// 文件名 : SomeInterface.ts
export interface SomeInterface {
// 代码部分
}

要在另外一个文件使用该模块就需要使用 import 关键字来导入:

import someInterfaceRef = require("./SomeInterface");

/// <reference path = "IShape.ts" /> 
export interface IShape { 
   draw(); 
}

import shape = require("./IShape"); 
export class Circle implements shape.IShape { 
   public draw() { 
      console.log("Cirlce is drawn (external module)"); 
   } 
}

import shape = require("./IShape"); 
export class Triangle implements shape.IShape { 
   public draw() { 
      console.log("Triangle is drawn (external module)"); 
   } 
}

import shape = require("./IShape"); 
import circle = require("./Circle"); 
import triangle = require("./Triangle");  
 
function drawAllShapes(shapeToDraw: shape.IShape) {
   shapeToDraw.draw(); 
} 
 
drawAllShapes(new circle.Circle());