Webpack 中 babel-loader 的“排除”选项

Question

模块.exports = { 条目：'./index.js', 输出： { 文件名：'index.min.js', 小路： '。/' }, 模块： { 装载机：[ { 测试：/\.js$/， 装载机：'巴别塔'， 排除：/node_modules/， 询问： { 预设：['es2015']， 插件：['转换运行时'] }, 缓存目录：真 } ] } } 常数 pi = 3.14159265; 让 s = "你好"; for (let codePoint of s) { 控制台.log（代码点）； }

当我删除“exclude”这一行时，编译后的文件会变大两倍，并抛出错误：“$extend is not a function”。

我想知道为什么 exclude 选项会影响编译过程。我只编译 ./index.js

Answer 1

这是导致此行为的 transform-runtime 插件 - 如果您不使用它，则大小是相同的。

为了找到您问题的根源，我创建了两种配置，一种排除了node_modules，另一种与您的配置相同。另外，我让 webpack 生成源映射（webpack 的 -d 参数 / devtool: "source-map" 配置）并查看包含的文件 not 存在于排除版本中（简单差异）。这些是

webpack:///../~/babel-runtime/core-js/object/create.js
webpack:///../~/babel-runtime/core-js/object/define-properties.js
webpack:///../~/babel-runtime/core-js/object/define-property.js
webpack:///../~/babel-runtime/core-js/object/get-own-property-descriptor.js
webpack:///../~/babel-runtime/core-js/object/get-own-property-names.js
webpack:///../~/babel-runtime/core-js/object/get-own-property-symbols.js
webpack:///../~/babel-runtime/core-js/object/get-prototype-of.js
webpack:///../~/babel-runtime/core-js/object/is-extensible.js
webpack:///../~/babel-runtime/core-js/object/keys.js
webpack:///../~/babel-runtime/core-js/object/prevent-extensions.js
webpack:///../~/babel-runtime/core-js/symbol.js
webpack:///../~/babel-runtime/core-js/symbol/iterator.js
webpack:///../~/babel-runtime/helpers/typeof.js
webpack:///../~/core-js/library/fn/object/create.js
webpack:///../~/core-js/library/fn/object/define-properties.js
webpack:///../~/core-js/library/fn/object/define-property.js
webpack:///../~/core-js/library/fn/object/get-own-property-descriptor.js
webpack:///../~/core-js/library/fn/object/get-own-property-names.js
webpack:///../~/core-js/library/fn/object/get-own-property-symbols.js
webpack:///../~/core-js/library/fn/object/get-prototype-of.js
webpack:///../~/core-js/library/fn/object/is-extensible.js
webpack:///../~/core-js/library/fn/object/keys.js
webpack:///../~/core-js/library/fn/object/prevent-extensions.js
webpack:///../~/core-js/library/fn/symbol/index.js
webpack:///../~/core-js/library/fn/symbol/iterator.js
webpack:///../~/core-js/library/modules/_enum-keys.js
webpack:///../~/core-js/library/modules/_is-array.js
webpack:///../~/core-js/library/modules/_keyof.js
webpack:///../~/core-js/library/modules/_meta.js
webpack:///../~/core-js/library/modules/_object-gopd.js
webpack:///../~/core-js/library/modules/_object-gopn-ext.js
webpack:///../~/core-js/library/modules/_object-gopn.js
webpack:///../~/core-js/library/modules/_object-gops.js
webpack:///../~/core-js/library/modules/_object-pie.js
webpack:///../~/core-js/library/modules/_object-sap.js
webpack:///../~/core-js/library/modules/_wks-define.js
webpack:///../~/core-js/library/modules/_wks-ext.js
webpack:///../~/core-js/library/modules/es6.object.create.js
webpack:///../~/core-js/library/modules/es6.object.define-properties.js
webpack:///../~/core-js/library/modules/es6.object.define-property.js
webpack:///../~/core-js/library/modules/es6.object.get-own-property-descriptor.js
webpack:///../~/core-js/library/modules/es6.object.get-own-property-names.js
webpack:///../~/core-js/library/modules/es6.object.get-prototype-of.js
webpack:///../~/core-js/library/modules/es6.object.is-extensible.js
webpack:///../~/core-js/library/modules/es6.object.keys.js
webpack:///../~/core-js/library/modules/es6.object.prevent-extensions.js
webpack:///../~/core-js/library/modules/es6.symbol.js
webpack:///../~/core-js/library/modules/es7.symbol.async-iterator.js
webpack:///../~/core-js/library/modules/es7.symbol.observable.js

transform-runtime 插件会处理这些文件，因此当您不排除 node_modules 时，它们会包含在您的构建中。