Question

我已经通过npm安装了不同的软件包来在React中运行一个简单的hello world应用程序（我是新手）。安装完成后，package.json具有此格式。

{
  "name": "test",
  "version": "1.0.0",
  "description": "test",
  "main": "index.js"
},
  "repository": {
  "type": "git",
  "url": "https://github.com/theo82"
},
  "keywords": [
  "test"
],
 "author": "Theo Tziomakas",
 "license": "ISC",
 "dependencies": {
 "react": "^15.4.2",
 "react-dom": "^15.4.2",
 "webpack": "^2.2.1"
  }
}

在cmd（Windows 8.1）中运行 npm start 后，我收到此错误。

 npm ERR! Unexpected token ',' at 6:4
 npm ERR!   },
 npm ERR!    ^

在各种答案中，人们通过使用干净缓存来解决这个问题

npm cache clean

然而，这对我不起作用:(。任何想法为什么会发生这种情况？

谢谢，

西奥。

Answer 1

您的文件中存在语法错误。您还应该指定start脚本应该执行的操作。例如，当您运行npm start节点时，应执行index.js文件

＆＃13;

{
  "name": "test",
  "version": "1.0.0",
  "description": "test",
  "main": "index.js",
  "scripts": {
    "start": "node index.js" 
  },
  "keywords": [
    "test"
  ],
  "author": "",
  "license": "ISC"
}

＆＃13;

Answer 2

package.json的语法有问题，在密钥{ timestamp: "2017-03-12T23:22:20.237+0000" status: 400 error: "Bad Request" exception: "org.springframework.validation.BindException" errors: [1] 0: { codes: [4] 0: "typeMismatch.userBean.dob" 1: "typeMismatch.dob" 2: "typeMismatch.java.util.Optional" 3: "typeMismatch" arguments: [1] 0: { codes: [2] 0: "userBean.dob" 1: "dob" defaultMessage: "dob" code: "dob" } defaultMessage: "Failed to convert property value of type 'java.lang.String' to required type 'java.util.Optional' for property 'dob'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@com.fasterxml.jackson.annotation.JsonFormat java.util.Date] for value '1988-10-07'; nested exception is java.lang.IllegalArgumentException" objectName: "userBean" field: "dob" rejectedValue: "1988-10-07" bindingFailure: true code: "typeMismatch" } message: "Validation failed for object='userBean'. Error count: 1" path: "/user" }

之后还有一个额外的}

main

npm start给出错误

2 个答案: