Question

我正在制作nodejs + expressjs服务器和反应胖客户端（SPA）。安装此package.json后：

{
  "name": "express-react",
  "version": "1.0.0",
  "description": "Some basic ReactJS",
  "author": "Greg",
  "license": "ISC",
  "private": true,
  "keywords": [
    "reactjs",
    "webpack"
  ],
  "scripts": {
    "start": "node ./bin/www"
  },
  "dependencies": {
    "body-parser": "~1.18.2",
    "cookie-parser": "~1.4.3",
    "debug": "~2.6.9",
    "express": "~4.15.5",
    "morgan": "~1.9.0",
    "pug": "^2.0.0-rc.4",
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "react-redux": "^5.0.6",
    "redux": "^3.7.2",
    "redux-logger": "^3.0.6",
    "serve-favicon": "~2.4.5"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-plugin-react-html-attrs": "^2.1.0",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-0": "^6.24.1",
    "webpack": "^3.10.0",
    "webpack-dev-middleware": "^2.0.5"
  }
}

运行DEBUG=express-react:* & npm start命令时出现此错误：

Error: Cannot find module 'webpack-dev-middleware'

我的app.js是由快速生成器生成的：

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var config = require('./webpack.config.js');
const webpackmiddleware = require('webpack-dev-middleware');
var webpack = require('webpack');

const compiler = webpack(config);

var index = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');


app.use(webpackmiddleware(compiler, {
  noInfo: true,
  publicPath: config.output.publicPath,
  stats: {colors: true},
}));
.....

它让我感到困惑..我在package.json文件中定义了webpack-dev-middleware包，但它说没找到它..为什么？有没有人遇到过这个问题？

提前感谢您的回复/建议！

Answer 1

您的webpack-dev-middleware中提到了{p> devDependencies，而不是dependencies。

如果NODE_ENV设置为production，则npm install仅安装生产依赖项并排除开发依赖项：

要安装devDependencies，请运行：

npm install --dev

找不到模块＆＃39; webpack-dev-middleware＆＃39;

1 个答案: