click() isn't working: scrolling issue?

Steps to reproduce

Tell us about your environment:

• Puppeteer version: 1.12.2
• Platform / OS version: uname -a Linux henrique-Latitude-5480 4.15.0-45-generic #⁠48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.2 LTS Release: 18.04 Codename: bionic
• URLs (if applicable):
• Node.js version: v10.15.1

What steps will reproduce the problem?

I have the following piece of code, in a simplified way:

await Promise.all([
    _ifrArvoreFrameSEI.waitForNavigation(), //_ifrArvoreFrameSEI is class: Frame
    _ifrVisualizacaoSEI.waitForNavigation(), // _ifrVisualizacaoSEI is class: Frame
    _ifrArvoreFrameSEI.click('a#anchor18335653')
]);

What is the expected result? Click on element ‘a#anchor18335653’ and resolves the waitForNavigation() promises.

What happens instead? sometimes waitForNavigation timeouts

So I ran Chrome with graphical interface, and verified that _ifrArvoreFrameSEI.click(‘a#anchor18335653’) doesn’t seem to be scrolling. When I have the following screen, it works:

But on this one, it doesn’t work:

I think the problem might be in the scroll bar marked with Red, as puppeteer doesn’t seem to be scrolling it. Sorry for the black stripes, I had to add them because the screen potentially shows private data.

‘a#anchor18335653’ is shown below.

When I manually scrolled the bar, in the 5 seconds given by Atomics.wait, it works:

var sab = await new SharedArrayBuffer(1024);
var int32 = await new Int32Array(sab);
await console.log("SLEEPING");
await Atomics.wait(int32, 0, 0,5000);

await Promise.all([
    _ifrArvoreFrameSEI.waitForNavigation(),
    _ifrVisualizacaoSEI.waitForNavigation(),
    _ifrArvoreFrameSEI.click('a#anchor18335653')
]);

It woks if Chrome is launched with defaultViewport: {width: 2000, height:2000}

I’ve also noticed that the code bellow works fine:

await Promise.all([
    _ifrArvoreFrameSEI.waitForNavigation(), //_ifrArvoreFrameSEI is class: Frame
    _ifrVisualizacaoSEI.waitForNavigation(), // _ifrVisualizacaoSEI is class: Frame
    _ifrArvoreFrameSEI.evaluate( () => document.querySelector('a#anchor18335653').click())
]);

Thanks.

[aslushnikov]

@hlr1983 thank you very much! I was able to repro and add a failing test; we’ll fix it shortly.

[hlr1983]

Ok. Sent to lushnikov[at]google.com