node.js - 如何让${port}在express服务器上工作

Question

我在 app.js 中使用了这段代码来在控制台中显示端口，但不起作用下面只是整个代码的一部分

const port = 8080;
app.listen(port, () => {
    console.log("hi its listening: ${port}!");
});

这是控制台的输出

hi its listening: ${port}!




const express=require('express');
const app=express();
const morgan=require('morgan');

const postRoutes=require("./routes/post");

app.use(morgan("dev"));

app.use('/',postRoutes);

 const port = 8080;//process.env.PORT || 8080;
 app.listen(port, () => {
 console.log("hi its listening: ${port}!");
 });

它应该显示:

hi its listening: 8080

Answer 1

您可以使用template strings (带反引号 - ``)或字符串连接:

// Template Strings example ...
console.log(`hi its listening: ${port}!`);

// String concatenation example ...
console.log('hi its listening: ' + port + '!');