Module not found: Error: Can't resolve 'ws'

Steps to reproduce

Tell us about your environment:

• Puppeteer version: 2.1.1
• Platform / OS version: Windows 10
• URLs (if applicable):
• Node.js version: v13.9.0

What steps will reproduce the problem?

• ng new test
• cd test
• npm install puppeteer

Please include code that reproduces the issue.

import * as puppeteer from 'puppeteer';

 GeneraPdf() {
    (async () => {
      const browser = await puppeteer.launch();
      const page = await browser.newPage();
      await page.goto('https://google.com');
      await page.pdf({path: 'hn.pdf', format: 'A4'});
    
      await browser.close();
    })();
  }

What is the expected result?

Compile

What happens instead?

PS C:\Users\Giacomo\Documents\Progetti\Angular\Testpuppeteer> ng serve

chunk {main} main.js, main.js.map (main) 13.7 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 140 kB [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.15 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 10.1 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 3.75 MB [initial] [rendered]
Date: 2020-02-28T11:06:47.573Z - Hash: fed516f7933ffc2f9d0a - Time: 5671ms

ERROR in ./node_modules/puppeteer/lib/WebSocketTransport.js
Module not found: Error: Can't resolve 'ws' in 'C:\Users\X\Documents\Progetti\Angular\Testpuppeteer\node_modules\puppeteer\lib'
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **

[navarrojandg]

So i was able to fix this issue by installing puppeteer-core and then in my webpack config adding

externals: {
  'puppeteer-core': 'require("puppeteer-core")'
}

so you would need to pass in the chrome executable path in order for launch / connect to work now

[pourya-zln]

Works for me! thanks man