tabs module router integration does not default to first tab

[lnr0626]

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-start-rg9ml3

Steps to reproduce

You should see the issue when you load the app

What is expected?

The first tab (titled 'Default' in the reproduction) should be active by default

What is actually happening?

No tabs are active, and so no content is shown

Environment	Info
ng-zorro-antd	8.2.1
Browser	Firefox, Chrome, Safari

[wzhudev]

It's a by-design. #4034

[lnr0626]

Ah, I didn't find anything about that in the docs (and completely missed it in the patch notes I guess), so assumed it was a regression. I'm surprised something like this was changed in a patch release; but it was pretty quick to work around. Thanks for the quick response.

[vthinkxie]

Hi @lnr0626
it is a bug fix for us since no tab should active if no router matched
the patch note is here

tabs: fix tabs still shows when no route is matched (#4034) (7ca0a52)