Nodemon无法启动本地服务器吗？

Question

我正在尝试运行我的Express项目，但无法执行。以下是我的package.json文件

我正在终端中编写以下命令，但会发生。仅供参考，我在正确的目录中

这是我的index.js文件

require("./models/User");
require("./models/Track");
const express = require("express");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const authRoutes = require("./routes/authRoutes");
const trackRoutes = require("./routes/trackRoutes");

const requireAuth = require("./middlewares/requireAuth");

const app = express();

app.use(bodyParser.json());
app.use(authRoutes);
app.use(trackRoutes);

const mongoUri =
  "MY_MONGO_URL";
mongoose.connect(mongoUri, {
  useNewUrlParser: true,
  useCreateIndex: true
});

mongoose.connections.concat("connected", () => {
  console.log("Connected to mongo instance");
});

mongoose.connection.on("error", err => {
  console.error("Error connecting to mongo", err);
});

app.get("/", requireAuth, (req, res) => {
  res.send(`Your Email: ${req.user.email}`);
});

app.listen(3000, () => {
  console.log("Listening on Port 3000");
});

Answer 1

我建议按以下方式更改您的脚本：

"scripts": {
    "dev": "nodemon index.js"
 },

然后从项目的根目录启动服务器：

npm run dev

Answer 2

我必须像使用yarn run dev一样使用yarn