react-router-dom@4.0.0需要对等体react @ ^ 15，但没有安装。您必须自己安装对等依赖项

Question

我已经使用安装了所有必需的库，npm install并且也完成了，npm install --save react-router-dom@4.0.0但仍然收到此错误。

我的Package.json

  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.2.1",
    "babel-loader": "^6.2.0",
    "babel-preset-es2015": "^6.1.18",
    "babel-preset-react": "^6.1.18",
    "chai": "^3.5.0",
    "chai-jquery": "^2.0.0",
    "jquery": "^2.2.1",
    "jsdom": "^8.1.0",
    "mocha": "^2.4.5",
    "react-addons-test-utils": "^0.14.7",
    "webpack": "^1.12.9",
    "webpack-dev-server": "^1.14.0"
  },
  "dependencies": {
    "babel-preset-stage-1": "^6.1.18",
    "lodash": "^3.10.1",
    "react": "^15.6.2",
    "react-dom": "^0.14.3",
    "react-redux": "4.3.0",
    "react-router": "^2.0.1",
    "react-router-dom": "^4.0.0",
    "redux": "^3.0.4"
  }

更新了react，redux，react-redux之后，所有的我都没有警告，但是在运行后却出现了以下错误 npm start

> node ./node_modules/webpack-dev-server/bin/webpack-dev-server.js

events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE 127.0.0.1:8080
    at Object.exports._errnoException (util.js:1020:11)
    at exports._exceptionWithHostPort (util.js:1043:20)
    at Server._listen2 (net.js:1258:14)
    at listen (net.js:1294:10)
    at net.js:1404:9
    at GetAddrInfoReqWrap.asyncCallback [as callback] (dns.js:62:16)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:81:10)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! redux-simple-starter@1.0.0 start: `node ./node_modules/webpack-dev-server/bin/webpack-dev-server.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the redux-simple-starter@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/myhome/.npm/_logs/2017-12-23T00_38_08_579Z-debug.log

Answer 1

你需要在你的反应 package.json

在package.json放置您的文件夹中尝试以下操作：

npm install react --save

如果react已经存在，请package.json验证该版本是否高于15.0。

如果这不能解决您的错误，请向我们提供您的 package.json