Javascript 无法运行我的React应用程序，出现一些错误

Github代码链接：

我已经运行了npmi，然后运行了devserver，我使用了webpack。 我在一台MacOs机器上。 我还制作了.babelrc文件

运行Thread run dev server后出现的错误：

VIKRANTs-MacBook-Pro:IndecisionAPP VIKRANT$ yarn run dev-server
yarn run v1.19.1
$ webpack-dev-server
Project is running at http://localhost:8080/
webpack output is served from /
Content not from webpack is served from /Users/VIKRANT/Desktop/IndecisionAPP/public
Hash: 35d055107a6a0062196d
Version: webpack 3.1.0
Time: 1305ms
    Asset    Size  Chunks                    Chunk Names
bundle.js  867 kB       0  [emitted]  [big]  main
  [35] multi (webpack)-dev-server/client?http://localhost:8080 ./src/app.js 40 bytes {0} [built]
  [36] (webpack)-dev-server/client?http://localhost:8080 5.59 kB {0} [built]
  [37] ./node_modules/url/url.js 23.3 kB {0} [built]
  [38] ./node_modules/node-libs-browser/node_modules/punycode/punycode.js 14.7 kB {0} [built]
  [39] ./node_modules/url/util.js 314 bytes {0} [built]
  [40] ./node_modules/querystring-es3/index.js 127 bytes {0} [built]
  [43] ./node_modules/strip-ansi/index.js 161 bytes {0} [built]
  [44] ./node_modules/ansi-regex/index.js 135 bytes {0} [built]
  [45] (webpack)-dev-server/client/socket.js 856 bytes {0} [built]
  [46] ./node_modules/sockjs-client/lib/entry.js 244 bytes {0} [built]
  [77] (webpack)-dev-server/client/overlay.js 3.6 kB {0} [built]
  [78] ./node_modules/ansi-html/index.js 4.26 kB {0} [built]
  [79] ./node_modules/html-entities/index.js 231 bytes {0} [built]
  [82] (webpack)/hot/emitter.js 77 bytes {0} [built]
  [84] ./src/app.js 2.33 kB {0} [built] [failed] [1 error]
    + 70 hidden modules

ERROR in ./src/app.js
Module build failed: Error: Requires Babel "^7.0.0-0", but was loaded with "6.25.0". If you are sure you have a
 compatible version of @babel/core, it is likely that something in your build process is loading the wrong vers
ion. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "b
abel-core" to see what is calling Babel. (While processing preset: "/Users/VIKRANT/Desktop/IndecisionAPP/node_m
odules/@babel/preset-env/lib/index.js")
    at throwVersionError (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/helper-plugin-utils/lib/inde
x.js:65:11)
    at Object.assertVersion (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/helper-plugin-utils/lib/i
ndex.js:13:11)
    at /Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/preset-env/lib/index.js:177:7
    at /Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/helper-plugin-utils/lib/index.js:19:12
    at /Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/options/option-mana
ger.js:317:46
    at Array.map (<anonymous>)
    at OptionManager.resolvePresets (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/options/option-manager.js:275:20)
    at OptionManager.mergePresets (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/options/option-manager.js:264:10)
    at OptionManager.mergeOptions (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/options/option-manager.js:249:14)
    at OptionManager.init (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)
    at File.initOptions (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/index.js:212:65)
    at new File (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/file/index.js:135:24)
    at Pipeline.transform (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-core/lib/transformation/pipeline.js:46:16)
    at transpile (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-loader/lib/index.js:49:20)
    at Object.module.exports (/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel-loader/lib/index.js:174:20)
 @ multi (webpack)-dev-server/client?http://localhost:8080 ./src/app.js
webpack: Failed to compile.

VIKRANTs MacBook Pro:犹豫不决App VIKRANTs$Thread运行开发服务器
纱线运行v1.19.1
$webpack开发服务器
项目正在运行http://localhost:8080/
网页包输出由/
非来自网页包的内容由/Users/VIKRANT/Desktop/IndecisionAPP/public提供
散列：35d055107a6a0062196d
版本：网页3.1.0
时间：1305毫秒
资产大小块块名称
bundle.js 867 kB 0[emissed][big]main
[35]多（网页包）-开发服务器/客户端？http://localhost:8080 ./src/app.js 40字节{0}[编译]
[36]（网页包）-开发服务器/客户端？http://localhost:8080 5.59 kB{0}[已建]
[37]./node_modules/url/url.js 23.3kb{0}[构建]
[38]./node_modules/node libs browser/node_modules/punycode/punycode.js 14.7kb{0}[编译]
[39]./node_modules/url/util.js 314字节{0}[builded]
[40]./node_modules/querystring-es3/index.js 127字节{0}[builded]
[43]./node_modules/strip ansi/index.js 161字节{0}[builded]
[44]./node_modules/ansi regex/index.js 135字节{0}[builded]
[45]（网页包）-dev server/client/socket.js 856字节{0}[编译]
[46]./node_modules/sockjs client/lib/entry.js 244字节{0}[builded]
[77]（网页包）-dev server/client/overlay.js 3.6kb{0}[内置]
[78]./node_modules/ansi html/index.js 4.26 kB{0}[编译]
[79]./node_modules/html entities/index.js 231字节{0}[builded]
[82]（网页包）/hot/emitter.js 77字节{0}[内置]
[84]。/src/app.js 2.33 kB{0}[build][failed][1错误]
+70个隐藏模块
./src/app.js中出现错误
模块生成失败：错误：需要Babel“^7.0.0-0”，但已加载“6.25.0”。如果你确定你有
兼容版本的@babel/core，可能是构建过程中加载了错误的版本
离子。检查此错误的堆栈跟踪，以查找没有提到“@babel/core”或“b”的第一个条目
abel core“来看看什么叫巴贝尔。（处理预设时：“/Users/VIKRANT/Desktop/IndecisionAPP/node\m”
odules/@babel/preset env/lib/index.js”）
在throwVersionError（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/helper-plugin-utils/lib/inde
x、 js:65:11）
在Object.assertVersion（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/helper-plugin-utils/lib/i
ndex.js:13:11）
在/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/preset env/lib/index.js:177:7
在/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/@babel/helper plugin-utils/lib/index.js:19:12
at/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/file/options/option mana
ger.js:317:46
在Array.map（）处
在OptionManager.resolvePresets（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/file/options/option manager.js:275:20）
在OptionManager.mergePresets（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/file/options/option manager.js:264:10）
在OptionManager.mergeOptions（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/file/options/option manager.js:249:14）
在OptionManager.init（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/file/options/option manager.js:368:12）
在File.initOptions（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/File/index.js:212:65）
在新文件中（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/File/index.js:135:24）
在Pipeline.transform（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel core/lib/transformation/Pipeline.js:46:16）
在transfile（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel loader/lib/index.js:49:20）
在Object.module.exports（/Users/VIKRANT/Desktop/IndecisionAPP/node_modules/babel loader/lib/index.js:174:20）
@多（网页包）-开发服务器/客户端？http://localhost:8080 ./src/app.js
网页包：未能编译。

请帮我纠正这个语法错误，我已经花了将近一天的时间试图解决这个问题。

首先

---

然后，从：

我们需要在我们的项目中添加一些babel包

npm安装--保存dev@babel/core@babel/cli@babel/preset env@babel/node

它们分别负责babels的一般工作、在命令行中使用babel、使用最新JS特性的能力以及在node中使用babel

---

或者，您可以就地修改“package.json”文件（如下所示），然后重新运行“Thread”：

{
  "name": "indecision-app",
  "version": "1.0.0",
  "main": "index.js",
  "author": "Andrew Mead",
  "license": "MIT",
  "scripts": {
    "serve": "live-server public/",
    "build": "webpack",
    "dev-server": "webpack-dev-server"
  },
  "dependencies": {
    "live-server": "^1.2.0",
    "node-sass": "4.5.3",
    "normalize.css": "7.0.0",
    "react": "15.6.1",
    "react-dom": "15.6.1",
    "react-modal": "2.2.2",
    "sass-loader": "6.0.6",
    "style-loader": "0.18.2",
    "validator": "8.0.0",
    "webpack": "3.1.0",
    "webpack-dev-server": "2.5.1"
  },
  "devDependencies": {
    "@babel/core": "^7.6.4",
    "@babel/preset-env": "^7.6.3",
    "@babel/preset-react": "^7.6.3",
    "babel-loader": "^7.1.1",
    "babel-plugin-transform-class-properties": "7.0.0", // upgrade this to 7.0.
    "css-loader": "0.28.4"
  }
}

首先

---

然后，从：

我们需要在我们的项目中添加一些babel包

npm安装--保存dev@babel/core@babel/cli@babel/preset env@babel/node

它们分别负责babels的一般工作、在命令行中使用babel、使用最新JS特性的能力以及在node中使用babel

---

或者，您可以就地修改“package.json”文件（如下所示），然后重新运行“Thread”：

{
  "name": "indecision-app",
  "version": "1.0.0",
  "main": "index.js",
  "author": "Andrew Mead",
  "license": "MIT",
  "scripts": {
    "serve": "live-server public/",
    "build": "webpack",
    "dev-server": "webpack-dev-server"
  },
  "dependencies": {
    "live-server": "^1.2.0",
    "node-sass": "4.5.3",
    "normalize.css": "7.0.0",
    "react": "15.6.1",
    "react-dom": "15.6.1",
    "react-modal": "2.2.2",
    "sass-loader": "6.0.6",
    "style-loader": "0.18.2",
    "validator": "8.0.0",
    "webpack": "3.1.0",
    "webpack-dev-server": "2.5.1"
  },
  "devDependencies": {
    "@babel/core": "^7.6.4",
    "@babel/preset-env": "^7.6.3",
    "@babel/preset-react": "^7.6.3",
    "babel-loader": "^7.1.1",
    "babel-plugin-transform-class-properties": "7.0.0", // upgrade this to 7.0.
    "css-loader": "0.28.4"
  }
}

模块生成失败：错误：需要Babel“^7.0.0-0”，但已加载 以“6.25.0”开头

这个错误是因为巴别塔7及以上是必需的。您可以使用babel升级包进行升级：

您可以在此处找到升级babel的正确方法：

模块生成失败：错误：需要Babel“^7.0.0-0”，但已加载 以“6.25.0”开头

这个错误是因为巴别塔7及以上是必需的。您可以使用babel升级包进行升级：

---

您可以在这里找到升级babel的正确方法：。

我认为您在本课程中的某些步骤做得不正确，您可能应该使用package.json

我建议您尝试删除node_模块、warn.lock和package-lock.json