Puppeteer not working when is not focused

Environment:

• Puppeteer version: 1.8.0
• Platform / OS version: Win 10 64b and Ubuntu 18.04.1 LTS
• URLs (if applicable): No
• Node.js version: v10.6.0

I am using puppeteer for testing my pages. When I run the app and hide it into background then puppeteer is paused (or freeze). When I move puppeteer into foreground is running normally.

I think that its problem “when window is not focused, its not working”.

This behavior is on windows and linux too.

Set up code:

			const args = []
			args.push('--start-maximized')
			args.push('--disable-gpu')
			args.push('--disable-setuid-sandbox')
			args.push('--force-device-scale-factor')
			args.push('--ignore-certificate-errors')
			args.push('--no-sandbox')

			this.driver = await puppeteer.launch({
				headless: false,
				args,
				userDataDir: `puppeteer_profile`,
			})

i happen only “sometimes” I don’t know when.

[entrptaher]

Nope you are not only one, I have same problem above.

[david-littlefield]

[Solution]:

Add the following values to the array you assign to the args property in the options object. Now, you should be able to run Puppeteer while your window is in the foreground, background, or minimized.

Update: I’m running parallel instances of Puppeteer using the same script in multiple windows with one tab per window. Each window completed successfully whether it was in the foreground, background, or minimized. And, it worked in both headless and headful mode.

const chromeArgs = [
  '--disable-background-timer-throttling',
  '--disable-backgrounding-occluded-windows',
  '--disable-renderer-backgrounding'
];

Solution and explanation available in an article written by Rohit Kumar, @rkr090 at Big Binary:

Debugging failing tests in puppeteer because of background tab