node.js - webpack-dev-server 在启动时不会创建初始包

Question

我已经构建了一个从 git 克隆的基本 babel webpack 入门项目。 git 存储库没有 dest/output/build 文件夹，也没有任何初始构建文件。我知道 webpack，所以我假设当 webpack-dev-server 启动时，它会创建一个文件夹(在我的例子中为“build”)并第一次编译源文件。相反，我被迫手动启动该过程，然后在初始编译之后 webpack-dev-server 编译更改。

我错过了什么？

package.json

{
  "name": "babel-webpack-starter",
  "version": "1.0.0",
  "description": "A Babel Webpack Stater Pack for compiling ES2015/ES6, ES2016/ES7 and ES2017 code doen to ES5. This will allow for the use of ES6 modules and later ECMAScript features such as async/await. Also includes a webpack-dev-server to auto load server without having to re-compile.",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack --mode=development",
    "start": "webpack-dev-server --output-public-path=/build/ --mode=development"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.5",
    "babel-preset-env": "^1.7.0",
    "webpack": "^4.16.4",
    "webpack-cli": "^3.1.0",
    "webpack-dev-server": "^3.1.5"
  }
}

webpack.config.js

 // Load Node modules
const path = require('path');

// Export modules
module.exports = {
    entry: {
        app: './src/app.js'        
    },
    output: {
        path: path.resolve(__dirname, 'build'),
        filename: 'app.bundle.js'
    },
    module: {
        rules: [{
            test: /\.js?$/,
            exclude: '/node_modules',
            loader: 'babel-loader',
            query: {
                presets: ['env']
            }
        }]
    }
};

Answer 1

webpack-dev-server不会把你的app.bundle.js在您的工作目录中，它将在内存中编译您的文件。

如果您想访问这些文件，请将公共(public)路径添加到输出选项或您在 npm start 中完成的操作脚本。

output: {
    ...
    publicPath: '/build/'
}

现在，您的文件将在localhost:<port>/build/app.bundle.js中可用

您可以查看this site获取更多信息