npm ERR! code EJSONPARSE

npm ERR! code EJSONPARSE

npm ERR! JSON.parse Failed to parse json
问题出现形式如下：

npm ERR! code EJSONPARSE
npm ERR! JSON.parse Failed to parse json
npm ERR! JSON.parse Unexpected string in JSON at position 513 while parsing '{
npm ERR! JSON.parse   "name": "sell",
npm ERR! JSON.parse   "version": "1.0.0"'
npm ERR! JSON.parse Failed to parse package.json data.
npm ERR! JSON.parse package.json must be actual JSON, not just JavaScript.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\57401\AppData\Roaming\npm-cache\_logs\2018-07-12T13_13_45_                                        726Z-debug.log

错误原因是：package.json文件的格式问题。检查属性名称喝属性值是否都用 “”
括起来；还有最后一个依赖的末尾不需要加 “，”；以及冒号问题。

正确的格式如下：

  "dependencies": {
    "babel-runtime": "^6.26.0",
    "vue": "^2.5.2",
    "vue-resource": "^1.5.1",
    "vue-router": "^3.0.1"
  },
  "devDependencies": {
    "autoprefixer": "^7.1.2",
    "babel-core": "^6.22.1",
    "babel-eslint": "^8.2.1",
    "babel-helper-vue-jsx-merge-props": "^2.0.3",
    "babel-loader": "^7.1.1",
    "babel-plugin-syntax-jsx": "^6.18.0",
    "babel-plugin-transform-runtime": "^6.22.0",
    "babel-plugin-transform-vue-jsx": "^3.5.0",
    "babel-preset-env": "^1.3.2",
    "babel-preset-stage-2": "^6.22.0",
    "babel-register": "^6.26.0",
    "chalk": "^2.0.1",
    "copy-webpack-plugin": "^4.0.1",
    "css-loader": "^0.28.0"
    }