Javascript 端口未定义
节点服务器正在运行。但在控制台中,它表示端口未定义Javascript 端口未定义,javascript,node.js,port,undefined,Javascript,Node.js,Port,Undefined,节点服务器正在运行。但在控制台中,它表示端口未定义 const express = require ('express'); const env = require ('dotenv') const app = express(); env.config(); app.listen(process.env.PORT, () => { console.log(`Server is running to port ${process.env.PORT}`); }) 您是否设置了
const express = require ('express');
const env = require ('dotenv')
const app = express();
env.config();
app.listen(process.env.PORT, () => {
console.log(`Server is running to port ${process.env.PORT}`);
})
您是否设置了环境变量port?port=2000/.env声明一个常量并在console.log中提供如下
const port=process.env.port | 8080代码>