Complex selector don't work in last blink version :nth-child(2):nth-last-child(2){}

Question

there is strange problem: after blink update selector .groups .group:nth-child(2):nth-last-child(2){} just stop working. But it still works well in webkit and gecko

Answer 1

You are making it too complex.

Write:

.groups .group:first-child{ /*first child*/
    background-color:yellow;
}
.groups .group:nth-child(2){ /*second child*/
    background-color:red;
}
.groups .group:last-child{ /*last child*/
    background-color:green;
}

Working fiddle here.