[英]nodemon app crashed - waiting for file changes
我正在獨自學習node.js,但我不明白為什么會收到錯誤消息"[nodemon] app crashed - waiting for file changes before starting.."
。 我的代碼與教程中的代碼相同。 有什么事嗎
謝謝您的幫助!
const express = require('express');
const mysql = require('mysql');
//create connection
const db = mysql.createConnection({
host: 'localhost',
user : 'root',
password : '123456',
});
//connect
db.connect((err)=>{
if(err){
throw err;
}
console.log("mysql is CONNECTED");
});
const app = express();
app.get('/createdb',(req,res) =>{
let sql = 'CREATE DATABASE nodemysql';
db.query(sql,(err, result)=>{
if(err) throw err;
console.log(result);
res.send('database created');
})
})
app.get('/createdb',()=>{
console.log("server started on port 3000");
})
app.listen('3000',()=>{
console.log("server started on port 3000");
});
確保已安裝mysql
:
npm install mysql --save
嘗試console.error(err)
然后return
:
var mysql = require("mysql");
var connection = mysql.createConnection({
host: "example.org",
user: "bob",
password: "secret"
});
connection.connect(function(err) {
if (err) {
console.error("error connecting: " + err.stack);
return;
}
console.log("connected as id " + connection.threadId);
});
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