Question


    module.exports = {
        entry: './index.js',
        output: {
            filename: 'index.min.js',
            path: './'
        },
        module: {
            loaders: [
                {
                    test: /\.js$/,
                    loader: 'babel',
                    exclude: /node_modules/,
                    query: {
                        presets: ['es2015'],
                        plugins: ['transform-runtime']
                    },
                    cacheDirectory: true
                }
            ]
        }
    }


    const pi = 3.14159265;

    let s = "Hello";

    for (let codePoint of s) {
        console.log(codePoint);
    }

当我删除＆＃34;排除＆＃34;的行时，编译的文件变得大约两倍并且抛出错误：＆＃34; $ extend不是函数＆＃34;。

我想知道为什么exclude选项会对编译过程产生影响。我只编译./index.js

Answer 1

导致此行为的transform-runtime插件 - 如果您将其删除，则尺寸相同。

为了找到问题的根源，我创建了两个配置，一个配置排除了node_modules，另一个配置就像你的配置一样。另外我让webpack生成源映射（web pack＆＃39; s -d 参数/ devtool：＆＃34; source-map＆＃34; config）并查看包含的文件不出现在排除版本（简单差异）中。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插件处理这些文件，因此当您不排除node_modules时，它们会包含在您的版本中。

＆＃34;排除＆＃34; Webpack中的babel-loader选项

1 个答案: