Grouping in CSS attribute selectors

Question

Are these equivalent:-

selector[attr1="val1"] [attr2="val2"] {
  property: value;
}

Select a {selector} which has a attribute called [attr1] that has the exact value of "val1", AND also the same {selector} which has a attribute called [attr2] that has the exact value of "val2". Since the logical operator is "AND", any one condition being wrong will make the selector fail.

selector[attr1="val1"], selector[attr2="val2"] {
 property: value;
}

This one uses grouping. Can I assume the same for the later as I did for the former?

Answer 1

不，逗号更像是OR，它将选择具有属性1或属性2或同时具有两者的目标