npm 在 node / express 上启动后出现错误

Question

index.js 文件具有以下代码；

const express = require('express');
const cors = require('cors');
const bodyParser = require('body-parser');
const morgan = require('morgan');
const app = express();

app.use(morgan('tiny'));
app.use(cors());
app.use(bodyParser.json());

app.get('/', (req, res) => {
    res.json({
        message: 'Welcome!'
    });
});

const port = process.env.PORT || 3000;
app.listen(port, () => {
    console.log(`Listening on port ${port}...`);
});

然后我编辑了 package.json

"main": "index.js",
  "scripts": {
    "start": "node index.js"
  },

依赖版本是：

"dependencies": {
    "body-parser": "^1.19.0",
    "cors": "^2.8.5",
    "express": "^4.17.1",
    "morgan": "^1.10.0"
  }

当我在终端上运行 npm start时，错误显示如下：

npm ERR! code ENOENT npm ERR! syscall open npm ERR! path E:\.....\package.json npm ERR! errno -4058 npm ERR! enoent ENOENT: no such file or directory, open 'E:\......\package.json' npm ERR! enoent This is related to npm not being able to find a file. npm ERR! enoent npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\Mamun\AppData\Roaming\npm-cache\_logs20-04-15T10_03_09_445Z-debug.log

我能做什么？请帮忙。提前致谢！

Answer 1

您在此处遇到的错误在该行指定找不到 package.json 文件：

npm ERR! enoent ENOENT: no such file or directory, open 'E:......\package.json'

您需要从 package.json 文件所在的文件夹中运行您的 npm start 命令。

npm 在 node / express 上启动后出现错误

npm ERROR after npm start on node / express

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