Cannot use `getEvenetListeners` in page.evaluate()

Steps to reproduce

Tell us about your environment:

• Puppeteer version:1.10.0
• Platform / OS version:MacOS
• URLs (if applicable):
• Node.js version:11.3

What steps will reproduce the problem?

Please include code that reproduces the issue.

1. Using getEventListeners in page.evaluate
2. I get this error message (node:53503) UnhandledPromiseRejectionWarning: Error: Evaluation failed: ReferenceError: getEventListeners is not defined
3. I thought getEventListeners is not the window / document property, could I enable something ( maybe DOMDebugger option? ) to make this property work?
4. Or … Is there another way to debug document if elements attach some unexpected event type / event listener?

What is the expected result?

Get event listeners array.

What happens instead?

error message Error: Evaluation failed: ReferenceError: getEventListeners is not defined

related issue: https://github.com/GoogleChrome/puppeteer/issues/3349 https://github.com/GoogleChrome/puppeteer/issues/3166 https://github.com/GoogleChrome/puppeteer/issues/1919

[aslushnikov]

For the hackers out there: you can get classes now from puppeteer/lib/api:

const {JSHandle} = require('puppeteer/lib/api');

[realdennis]

In puppeteer@1.13, we could not import (require) ElementHandle from ExecutionContext, I just replace ElementHandle with JSHandle, I am not sure this a good alternative solution.

Workaround for who need this method in the latest version.

  const { JSHandle } = require('puppeteer/lib/JSHandle');
  JSHandle.prototype.getEventListeners = function() {
    return this._client.send('DOMDebugger.getEventListeners', {
      objectId: this._remoteObject.objectId
    });
  };