babel-loader@7.1.2需要一个名为webpack的对等程序

Question

在安装所有node_modules时，我遇到了这个问题。这让我发疯了。

babel@7.1.2需要一个名为webpack的对等程序

这是我的package.json文件

{
  "name": "react-router-firebase-auth",
  "version": "0.1.0",
  "private": true,
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "react-scripts": "0.9.5"
  },
  "dependencies": {
    "@atlaskit/button": "3.0.0",
    "@atlaskit/css-reset": "1.1.4",
    "@atlaskit/field-text": "4.0.1",
    "@atlaskit/modal-dialog": "2.1.1",
    "@atlaskit/page": "4.0.1",
    "@atlaskit/util-shared-styles": "2.3.1",
    "@shopify/polaris": "^1.5.1",
    "babel-eslint": "^7.0.0",
    "bootstrap": "^3.3.7",
    "eslint": "3.16.1",
    "eslint-plugin-react": "6.4.1",
    "express": "^4.16.1",
    "firebase": "^4.5.0",
    "firebase-admin": "^5.4.1",
    "firestore": "^1.1.6",
    "fixed-data-table": "^0.6.4",
    "griddle-react": "^1.8.1",
    "jquery": "^3.2.1",
    "node-localstorage": "^1.3.0",
    "nodemon": "^1.12.1",
    "react": "^15.5.3",
    "react-bootstrap": "^0.31.3",
    "react-bootstrap-button-loader": "^1.0.8",
    "react-bootstrap-navbar": "^1.1.0",
    "react-data-grid": "^2.0.59",
    "react-date-picker": "^6.1.2",
    "react-dom": "^15.5.3",
    "react-fontawesome": "^1.6.1",
    "react-router-dom": "^4.0.0-beta.8",
    "react-scripts": "^0.9.5",
    "react-transition-group": "^1.2.0",
    "reactstrap": "^4.8.0",
    "requestify": "^0.2.5",
    "simple-react-bootstrap": "^0.2.7",
    "styled-components": "1.4.6",
    "url": "^0.11.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }
}

我在这个项目中使用create-react-app。因此，我无法更改webpack.config.js文件。我在这里该怎么做？

Answer 1

请读这篇文章。它描述了对等依赖是什么。

https://stackoverflow.com/a/34645112/2379376

这意味着你根本没有安装webpack，或者你安装了一个不同的版本(webpack 1.x)。但是这个插件需要webpack在版本2或3中正常工作。

你能做的就是

npm install webpack -g

因此npm将在您的系统上安装最新版本的webpack。但现在，当其他装载机需要更老版本的webpack时，可能会出现其他同行警告。

Answer 2

使用Webpack 4时的

我也遇到过同样的错误，但实际上我已经安装了webpack 4。为了解决这个问题，我在babel-加载器文档上使用了这个指令，并安装了以下额外的库：babel-loader、@babel/core和@babel/preset。

安装所有所需库的命令：

npm install -D babel-loader @babel/core @babel/preset-env webpack

安装前的package.json devDependencies：

  "devDependencies": {
    "chai": "^4.1.2",
    "enzyme": "^3.2.0",
    "enzyme-adapter-react-16": "^1.1.0",
    "expect": "^22.0.3",
    "jest-junit": "^3.3.0",
    "jest-junit-reporter": "^1.1.0",
    "node-sass": "^4.9.2",
    "prop-types": "^15.6.0",
    "react-test-renderer": "^16.2.0",
    "redux-mock-store": "^1.4.0",
    "sass-loader": "^6.0.6",
    "webpack": "^4.25.1",
    "webpack-cli": "^3.1.2",
    "webpack-dev-server": "^3.1.10"
  }

安装后的：

"devDependencies": {
  "@babel/core": "^7.1.6",
  "@babel/preset-env": "^7.1.6",
  "babel-loader": "^8.0.4",
  "chai": "^4.1.2",
  "enzyme": "^3.2.0",
  "enzyme-adapter-react-16": "^1.1.0",
  "expect": "^22.0.3",
  "jest-junit": "^3.3.0",
  "jest-junit-reporter": "^1.1.0",
  "node-sass": "^4.9.2",
  "prop-types": "^15.6.0",
  "react-test-renderer": "^16.2.0",
  "redux-mock-store": "^1.4.0",
  "sass-loader": "^6.0.6",
  "webpack": "^4.25.1",
  "webpack-cli": "^3.1.2",
  "webpack-dev-server": "^3.1.10"
}

希望它能帮上忙

Answer 3

在节点环境和development(as dev依赖项中安装webpack 全局)。webpack的主要功能是将JavaScript文件捆绑在一个browser.As中使用，每次您在开发时更改index.js (npm的入口点)，那么您也必须运行webpack来修改bundle.js文件，所以我们需要在这两个环境中安装。(节点环境和开发环境)运行下面的命令来解决这个问题：

npm install -g webpack@3.10.0
npm install --save-dev webpack@3.10.0

这里我用3.10.0表示webpack。你也可以用4。我想这个会有帮助的。