我使用 webpack 打包代码 使用三方模块的时候发现, 直接 require node_modules 目录下的三方模块, 可以正常加载. 但是将该模块拷贝到其他目录后, 无法正常载入.

通过包名+文件名导入三方库, 和直接通过路径导入三方库有什么区别?

三方该模块的头部是这么写的, 似乎是为了兼容 AMD 和 CommonJS

(
	function (root, factory) {
		if (typeof define === 'function' && define.amd) {
			// AMD. Register as an anonymous module unless amdModuleId is set
			define(
				[], function () {
					return (
						root['Autolinker'] = factory()
					);
				}
			);
		}
		else if (typeof exports === 'object') {
			// Node. Does not work with strict CommonJS, but
			// only CommonJS-like environments that support module.exports,
			// like Node.
			module.exports = factory();
		}
		else {
			root['Autolinker'] = factory();
		}
	}(
		this, function () {

如果将这个三方包拷贝到工程的目录中. 编译后的结果会是

/***/ },
/* 628 */
/***/ function(module, exports, __webpack_require__) {
省略
(function (root, factory) {
	if (true) {
		// AMD. Register as an anonymous module unless amdModuleId is set
		!(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_RESULT__ = function () {
省略
	} else if ((typeof exports === 'undefined' ? 'undefined' : _typeof(exports)) === 'object') {
省略
	} else {
省略
	}
})(undefined, function () {

也就是这个立即函数的参数this 变成了 undefined. 如果是直接以包名形式导入则不会``

/***/ },
/* 1354 */
/***/ function(module, exports, __webpack_require__) {

var __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;(function (root, factory) {
  if (true) {
    // AMD. Register as an anonymous module unless amdModuleId is set
    !(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_RESULT__ = function () {
      return (root['Autolinker'] = factory());
    }.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
  } else if (typeof exports === 'object') {
    // Node. Does not work with strict CommonJS, but
    // only CommonJS-like environments that support module.exports,
    // like Node.
    module.exports = factory();
  } else {
    root['Autolinker'] = factory();
  }
}(this, function () {