無法運行“npm start”

Question

這是我的 package.json 文件：

{
  "name": "martina",
  "version": "1.0.0",
  "description": "d",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "d"
  },
  "author": "",
  "license": "ISC"
}

我應該怎么辦？ 順便說一下，我有一台 Mac！

編輯：我做了你們推薦的並添加了腳本啟動，但是現在當我運行“npm start”時，我得到了這個：

> martina@1.0.0 start /Users/martina
> node index.js

internal/modules/cjs/loader.js:589
    throw err;
    ^

Error: Cannot find module '/Users/martina/index.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:587:15)
    at Function.Module._load (internal/modules/cjs/loader.js:513:25)
    at Function.Module.runMain (internal/modules/cjs/loader.js:760:12)
    at startup (internal/bootstrap/node.js:303:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:872:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! martina@1.0.0 start: `node index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the martina@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/martina/.npm/_logs/2020-06-11T08_05_28_654Z-debug.log

Answer 1

您需要在 scripts 下添加start scripts ，即：

{
  "name": "martina",
  "version": "1.0.0",
  "description": "d",
  "main": "index.js",
  "scripts": {
    "start": "echo STARTING...",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "d"
  },
  "author": "",
  "license": "ISC"
}

嘗試npm run test以了解scripts字段如何為package.json工作。

Answer 2

您需要在 scripts 下添加一個start scripts ，並在本地節點服務器上托管或啟動應用程序，添加命令node index.js作為start腳本的值。

{
  "name": "martina",
  "version": "1.0.0",
  "description": "d",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "d"
  },
  "author": "",
  "license": "ISC"
}

PS：運行命令npm start ，請確保您位於正確的項目目錄中。 文件index.js和package.json需要作為該項目目錄的直接子項存在。

項目結構：

martina
  |- index.js
  |- package.json
  |- file1
  |- file2
  |- ...other files
  ...

在上面的項目結構中看到， martina是項目的主目錄。 在package.json里面，可以找到index.js和martina 。

Answer 3

{
  "name": "martina",
  "version": "1.0.0",
  "description": "d",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "d"
  },
  "author": "",
  "license": "ISC"
}

您的 package 通過查看文件出現。 您剛剛創建了項目。 看來你的 index.js 文件的目錄不正確。 您在 package.json 目錄本身中創建 index.js 文件，然后運行節點 index.js 或 npm 啟動命令

> martina@1.0.0 start /Users/martina
> node index.js

internal/modules/cjs/loader.js:589
    throw err;
    ^

Error: Cannot find module '/Users/martina/index.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:587:15)
    at Function.Module._load (internal/modules/cjs/loader.js:513:25)
    at Function.Module.runMain (internal/modules/cjs/loader.js:760:12)
    at startup (internal/bootstrap/node.js:303:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:872:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! martina@1.0.0 start: `node index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the martina@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/martina/.npm/_logs/2020-06-11T08_05_28_654Z-debug.log

試試這個。 您的解決方案將完成。 如果您仍然遇到錯誤，請告訴我