angular viewChild for dynamic elements inside ngFor

TL;DR Use ViewChildren instead of ViewChild

As @Commerical Suicide mentioned you cannot set the references dynamically.

The #div is called template reference variable.

You can access your divs via ViewChildren in you *.ts file.

Sample: @ViewChildren('div') divs: QueryList<ElementRef>

Then you can call multiple methods on your new QueryList, like forEach or find.