项目下载并npm install后，执行npm run dev 报如下错误：
Vue packages version mismatch:
- [email protected]
- [email protected]
This may cause things to work incorrectly. Make sure to use the same version for both.
If you are using vue-loader@>=10.0, simply update vue-template-compiler.
If you are using vue-loader@<10.0 or vueify, re-installing vue-loader/vueify should bump vue-template-compiler to the latest.
原因：版本不匹配，需要将vue改成和vue-template-compiler一样的版本
方法一：改 vue
npm install [email protected] --save
方法二：改 vue-template-compiler
先卸载：npm uninstall vue-template-compiler
再安装：npm install vue-template-compiler再执行npm run dev，就OK了