如何使$ {port}在Express Server中工作

Question

我已经在app.js中使用此代码制作了在控制台中显示端口的信息，但在下面无法正常工作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

您可以使用模板字符串（带有反引号-``）或字符串串联：

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

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