[4.0] Uncaught TypeError in mobile view if article is open

[ghost]

Steps to reproduce the issue

The first click is at the three dots at the bottom of the screen:

Expected result

Click on link open frontend.

Actual result

Click on link cause Uncaught TypeError.

System information

Additional comments

Rotate the viewport and error is gone. Same behaviour using Safari/Mac.

[dgrammatiko]

@PhilETaylor once #33877 is merged I will patch also this one as well

[brianteeman]

I'm getting a different error

dropdown.min.js?5.0.2:1 Uncaught TypeError: Cannot read property 'classList' of undefined
    at Dropdown.show (dropdown.min.js?5.0.2:1)
    at Dropdown.toggle (dropdown.min.js?5.0.2:1)
    at HTMLDivElement.<anonymous> (dropdown.min.js?5.0.2:1)
    at HTMLDivElement.n (dom.min.js?1627422273:1)

[dgrammatiko]

There's no real issue here, the problem is the Mobile emulator:

On a real browser:

On EMULATION mode:

[brianteeman]

No it depends on your screen size and if it will display the three dots or not which is where the bug is.

This is from my phone not an emulator

[dgrammatiko]

Test #35011

[brianteeman]

for reference can also be tested in a desktop browser with a width of approx 700px

[richard67]

Closing as having a pull request. Please test #35011 . Thanks in advance.