使用外部产品的问题

Question

我试图使用obj/commonjs语法设置一个外部包，但是查看它返回的module.exports = undefined包

这是我的配置：

var path = require('path');

module.exports = {
    entry: path.resolve(__dirname, './src/index.js'),
    output: {
        path: path.resolve(__dirname, './build'),
        filename: 'index.js'
    },
    target: 'node',
    resolve: {
        alias: {
            Utilities: path.resolve(__dirname, './src/utilities/')
        },
        extensions: ['.js', '.jsx']
    },
    externals: {
        tessel: {
            commonjs: "tessel",
        },
    },
    module: {
        rules: [
            { test: /\.(js|jsx)$/, use: 'babel-loader' },
        ]
    }
}

Answer 1

您需要将output.libraryTarget设置为commonjs。Webpack使用libraryTarget来确定用于外部的导入的类型。将output更改为：

output: {
    path: path.resolve(__dirname, './build'),
    filename: 'index.js',
    libraryTarget: 'commonjs'
},

源webpack/lib/WebpackOptionsApply.js