根据编译时指定的模块目标参数，编译器会生成相应的供Node.js (CommonJS)，Require.js (AMD)，isomorphic (UMD), SystemJS或ECMAScript 2015 native modules (ES6)模块加载系统使用的代码。 想要了解生成代码中define，require 和 register的意义，请参考相应模块加载器的文档。
下面的例子说明了导入导出语句里使用的名字是怎么转换为相应的模块加载器代码的。
SimpleModule.ts
import m = require("mod");
export let t = m.something + 1;
AMD / RequireJS SimpleModule.js
define(["require", "exports", "./mod"], function (require, exports, mod_1) {
exports.t = mod_1.something + 1;
});
CommonJS / Node SimpleModule.js
let mod_1 = require("./mod");
exports.t = mod_1.something + 1;
UMD SimpleModule.js
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
let v = factory(require, exports); if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define(["require", "exports", "./mod"], factory);
}
})(function (require, exports) {
let mod_1 = require("./mod");
exports.t = mod_1.something + 1;
});
System SimpleModule.js
System.register(["./mod"], function(exports_1) {
let mod_1;
let t;
return {
setters:[
function (mod_1_1) {
mod_1 = mod_1_1;
}],
execute: function() {
exports_1("t", t = mod_1.something + 1);
}
}
});
Native ECMAScript 2015 modules SimpleModule.js
import { something } from "./mod";
export let t = something + 1;