how to send multiple script at once

Question

I am using puppeteer and express js to make an api. I have done my code stuff and now i am testing the api on postman but i have a problem which is i could not send multiple scripts at once i mean i can send but just returning the last one.So what is the problem.

const express = require("express");
const app = express();
app.use(express.json())
const puppeteer = require("puppeteer");

const port = 3000;

let browser = null;

var target_url = ""

app.post('/get/script_result', async (req, res) => {

  if (browser == null) browser = await puppeteer.launch({
    headless: false, defaultViewport: null, args: ['--disable-infobars', '--disable-notifications', '--disable-default-apps',
      '--no-sandbox', '--mute-audio', '--ignore-certificate-errors', '--disable-features=LookalikeUrlNavigationSuggestionsUI'], ignoreHTTPSErrors: true
  });

  try {

  
  var page = await browser.newPage()

  await page.goto(req.body.target_url);

  var script = ""

  var script_delay = ""

  await page.waitForTimeout(`${req.body.script_delay}`)

 const handle = await page.evaluate(`${req.body.script}`)

 
  res.send(handle)
  res.end()

  
  //await page.close();

  return res.status(200)


  }
  catch (e) {
    console.log(e);

    res.send(e)

    res.status(500)

  }

})


app.listen(port, () => {
  console.log(`app is running on port: ${port}`);
});