运行：
1 npm run dev 出现下面错
Error: listen EADDRNOTAVAIL 111.166.1.29:8081
at Object._errnoException (util.js:992:11)
at _exceptionWithHostPort (util.js:1014:20)
at Server.setupListenHandle [as _listen2] (net.js:1338:19)
at listenInCluster (net.js:1396:12)
at GetAddrInfoReqWrap.doListen [as callback] (net.js:1505:7)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:97:10)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] dev: `node build/dev-server.js wx`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\linxue\AppData\Roaming\npm-cache\_logs\2018-12-29T05_52_00_200Z-debug.log
【注意上面，监听的是111.166.1.29，但是我本机ip（cmd->ipconfig）不是这个，我也没有配置host为111.166.1.29，但是按照脚手架配置的自动获取我的ip，最后查看我本机的host文件，发现host（C:\Windows\System32\drivers\etc）中 ：
111.166.1.29 localhost
所以这里监听本地host 111.166.1.29，但这ip不存在啊，所以就运行监听报错了，将ip该自己本机ip就好
【本机ip】 localhost
】