Access javascript window variables in Puppeteer

Question

In my Puppeteer script, I use file JS to execute before loading the page:

const preloadFile = fs.readFileSync('./file.js', 'utf8');
const id = await page.evaluateOnNewDocument(preloadFile);

file.js contains:

const i = setInterval(()=>{
  if (window.turnstile) {
    clearInterval(i)
    window.turnstile.render = (a,b) => {
        b.userAgent = navigator.userAgent
    window.tsCallback = b.callback
    window.action = b.action
    window.data = b.cData
      console.log(b)
      return 'foo'
    }
  }
},50)

This script prints an object (Action, Cdata, Callback...) on the browser console

I want to get this object from puppeter side and be able to call function callback().

I used page.evaluate() but it didn’t work for me

Answer 1

You can use my Puppeteer wrapper library https://github.com/wix-incubator/bubanai/pulls to achieve this goal (get the object from the browser console), use new ConsoleDriver(context).getMessages() method, and then convert the received object from the array to JSON...

Or just copy the ConsoleDriver code into your project.

refer to

Usage examples