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...< /p>

Or just copy the ConsoleDriver code into your project.

refer to

Usage examples