1  const querystring = require('querystring');
2  const port = 3000
3  app.listen(port, () => {
4          console.log(`Example app listening at http://IP:${port}`)
5  })
6  app.get('/getcode', (req, res) => {
7    var data = {
8       'appid': '你的小程序ID',
9       'secret': '你的小程序秘钥',
10      'js_code': req.query.code,
11      'grant_type': 'authorization_code'
12    };
13    var content = querystring.stringify(data);
14    let url = 'https://api.weixin.qq.com/sns/jscode2session?' + content;
15    console.log(url)
16 })

let text1 = 'hello ' + 'world';
let text2 = 'world';
let text3 = `hello ${text2}`;
console.log(text1);
console.log(text3);