Typescript 有一种统一的语言处理模块的导入和导出,在编译时可以根据最终js文件应用到哪一种模块系统,根据模块系统的规范,生成代码
原始Ts文件
import m = require("mod"); export let t = m.something + 1;
下面是TS根据不同模块系统,编译的结果
CommonJS
"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.twoPi = void 0; const constants_1 = require("./constants"); exports.twoPi = constants_1.valueOfPi * 2;
AMD
define(["require", "exports", "./constants"], function (require, exports, constants_1) { "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.twoPi = void 0; exports.twoPi = constants_1.valueOfPi * 2; });
UMD
(function (factory) { if (typeof module === "object" && typeof module.exports === "object") { var v = factory(require, exports); if (v !== undefined) module.exports = v; } else if (typeof define === "function" && define.amd) { define(["require", "exports", "./constants"], factory); } })(function (require, exports) { "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.twoPi = void 0; const constants_1 = require("./constants"); exports.twoPi = constants_1.valueOfPi * 2; });
System
System.register(["./constants"], function (exports_1, context_1) { "use strict"; var constants_1, twoPi; var __moduleName = context_1 && context_1.id; return { setters: [ function (constants_1_1) { constants_1 = constants_1_1; } ], execute: function () { exports_1("twoPi", twoPi = constants_1.valueOfPi * 2); } }; });
ES6 ES2020 ESNext 规范一致
import { valueOfPi } from "./constants"; export const twoPi = valueOfPi * 2;
标签:function,exports,Typescript,require,twoPi,编译,模块,valueOfPi,constants From: https://www.cnblogs.com/chenyingzuo/p/16850885.html