升级Node.js 8 之后，npm run dev 会出现问题

[rouwan]

问题：
未处理的promise rejection
UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: spawn cmd ENOENT

未处理的promise rejection 将终止Node.js 进程
DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

问题分析：
经过定位，发现是引用的包 opn 中有未捕获的错误导致。
这个错误在之前会打印出 未处理的promise.rejection ，但不会终止进程。
在升级Node.js 8 之后，会终止进程，导致无法正常启动开发服务器

建议：
替换或修复opn包中的未捕获promise rejection

[Binaryify]

升级到8.1.1可解决问题

[zigomir]

Thanks @Binaryify!

I actually couldn't do vue init with node 8.1.1, but it seems to be fixed with 8.1.2.

@rouwan does it work for you with newest node?

[rouwan]

谢谢~！

[shuaiZend]

''
[root@localhost index]# node -v
v8.4.0

''
出现这个错误
‘
DONE Compiled successfully in 2570ms 21:43:59

Listening at http://localhost:8080

(node:22397) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Exited with code 3
(node:22397) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
’

直接vue init之后，
运行npm run dev
就提示这个错误,希望得到解决方式。

[shuaiZend]

fiexd.
1.reinstall nodejs to v6.11
2.npm install webpack
:)

[nevermind123456]

node一定要是6才可以解决吗？

[dimitrisnl]

This is really annoying issue. Why should i limit myself to node 6?

[posva]

You can ofc also use a more up to date version 🙂

[dimitrisnl]

@posva i try 8.9 and it fails.

[SeanBurt]

node 8.9.3 also has this problem.

[Crips12]

运行npm run dev之后出现(node:7240) UnhandledPromiseRejectionWarning: SyntaxError: Unexpected token '??='
at Loader.moduleStrategy (internal/modules/esm/translators.js:145:18)
(Use node --trace-warnings ... to show where the warning was created)
(node:7240) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:7240) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.问题