[BUG] OOPIFs cannot read property 'xxx' of undefined for iframes in non-headless mode

[malithlk]

Context:

• Playwright Version: 0.12.1
• Operating System: Windows
• Extra: Extra: node@13.6.0, npm@6.13.0

Code Snippet

Help us help you! Put down a short code snippet that illustrates your bug and
that we can run and debug locally. For example:

const { chromium, devices } = require('playwright');

(async () => {
  const browser = await chromium.launch({
    headless : false
  });
 const page = await browser.newPage();
....................
....................
const myframe = page.frames().find(frame => frame.name() === 'tool_content');
await myframe.click('//span[contains(.,"Access now")]');

Describe the bug

getting below error
"TypeError: Cannot read property 'click' of undefined"

This happens when I use "headless : false" in launch options and it's working fine for "headless : true". Adding "args: ['--disable-features=site-per-process']" into launch options will do the trick.

 const browser = await chromium.launch({
    headless : false,
    args: ['--disable-features=site-per-process']
  });

[pavelfeldman]

I believe you are dealing with the out-of-process-iframe. Those are not yet supported. Disabling site-per-process does not disable oopifs on the Google login page and similar pages.

[tinovyatkin]

Had the same problem with Stripe Iframe, --disable-features=site-per-process did the trick, thank @masthijohna !

[dgozman]

Should be fixed in the next 0.13 release.