为什么 NPM 无法启动并正确部署到主机 3000？

Question

我安装了最新版本的节点和 vs 代码。我可以轻松安装节点模块，但它不会启动和部署到主机 3000。

这里是错误。

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\webpack-dev-server\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\watchpack-chokidar2\node_modules\fsevents):
Starting the development server...

events.js:377
      throw er; // Unhandled 'error' event
      ^

Error: spawn powershell ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:274:19)
    at onErrorNT (internal/child_process.js:469:16)
    at processTicksAndRejections (internal/process/task_queues.js:82:21)
Emitted 'error' event on ChildProcess instance at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:280:12)
    at onErrorNT (internal/child_process.js:469:16)
    at processTicksAndRejections (internal/process/task_queues.js:82:21) {
  errno: -4058,
  code: 'ENOENT',
  syscall: 'spawn powershell',
  path: 'powershell',
  spawnargs: [
    '-NoProfile',
    '-NonInteractive',
    '–ExecutionPolicy',
    'Bypass',
    '-EncodedCommand',
    'UwB0AGEAcgB0ACAAIgBgACIAaAB0AHQAcAA6AC8ALwBsAG8AYwBhAGwAaABvAHMAdAA6ADMAMAAwADAAYAAiACIA'
  ]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! reminder@0.1.0 start: `react-scripts start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the reminder@0.1.0 start 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:

我不确定我的 package.json 是否是因为 dom 没有部署所以这里也是下面的代码。如果您还需要其他任何东西，请告诉我。我再次不知道为什么它不自动打开主机 3000 并将内容呈现给 dom?

{
  "name": "reminder",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.5.0",
    "@testing-library/user-event": "^7.2.1",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-icons": "^3.11.0",
    "react-scripts": "3.4.3"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "CI= react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

Answer 1

这里解决了，看下面的视频，他帮我解决了。不附属 https://www.youtube.com/watch?v=1sFH30JjB6E

为什么 NPM 无法启动并正确部署到主机 3000？

Why is NPM not start and deploying properly to host 3000?

javascript

powershell

node.js

react-scripts