请问这段代码中exports、module是什么意思？this, (function

Question

(function (global, factory) {    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :        typeof define === 'function' && define.amd ? define(['exports'], factory) :            (factory((global.echarts = {})));}(this, (function (exports) {    'use strict';// (1) The code `if (__DEV__) ...` can be removed by build tool.// (2) If intend to use `__DEV__`, this module should be imported. Use a global// variable `__DEV__` may cause that miss the declaration (see #6535), or the// declaration is behind of the using position (for example in `Model.extent`,// And tools like rollup can not analysis the dependency if not import).    var dev;// In browser    if (typeof window !== 'undefined') {`请输入代码`        dev = window.__DEV__;    }// In node    else if (typeof global !== 'undefined') {        dev = global.__DEV__;    }    if (typeof dev === 'undefined') {        dev = true;    }    var __DEV__ = dev;}

Answer 1

umd兼容处理。
可以看umd部分