Unexpected end of JSON input while parsing near错误

mpvue的问题 注意一下

解决办法
第一步，执行

npm install --registry=https://registry.npm.taobao.org 

第二步

npm cache clean --force

如果之后运行项目出现

Command start unrecognized. Make sure that you have run npm install and that you are inside a react-native project.

请执行

yarn add react-native-cli

解决办法来自https://blog.csdn.net/CrackgmKey/article/details/88972834