在node.js中设置babel-watch时遇到问题

Question

我在安装babel后尝试安装babel手表我的json文件如下[]

{

“名称”：“ t3”，

“版本”：“ 1.0.0”，

“描述”：“”，

“ main”：“ app.js”，

“脚本”：{

"test": "echo \"Error: no test specified\" && exit 1",

"build": "babel server.js --out-dir build",

"dev-start": "babel-watch server.js"
}，

“作者”：“”，

“许可证”：“ ISC”，

“依赖项：{

"express": "^4.17.1"
}，

“ devDependencies”：{

"babel-cli": "^6.26.0",

"babel-preset-env": "^1.7.0",

"babel-watch": "^7.0.0"
}

}

但是我在运行时遇到此错误npm run dev-start

npm run dev-start

> [email protected] dev-start C:\Users\PRO\Desktop\t3
> babel-watch server.js

internal/modules/cjs/loader.js:583
    throw err;
    ^

Error: Cannot find module '@babel/core'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
    at Function.Module._load (internal/modules/cjs/loader.js:507:25)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)
    at Object.<anonymous> (C:\Users\PRO\Desktop\t3\node_modules\babel-watch\babel-watch.js:7:15)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] dev-start: `babel-watch server.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] dev-start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

我在安装babel之后尝试安装babel手表，我的json文件如下{“ name”：“ t3”，“ version”：“ 1.0.0”，“ description”：“”，“ main”： “ app.js”，“ scripts”：{“ test”：“ echo \” ...

Answer 1

尝试