How to check if a TR contains a TD with a specific CSS class with jquery?

Question

I know you can use .find to find td:contains(\'text\'), but if I have a tr with say, 3 td\'s, and one of the td\'s might have class=

Answer 1

if ($("tr").has("td.specialclass").length > 0) {
    // has specialclass
}

or

if ($("tr:has(td.specialclass)").length > 0) {
    // has specialclass
}

Answer 2

To select any tr that has a td.specialclass:

$('tr:has(td.specialclass)')

Or if you have a tr (represented by this) and you simply want to check if it has such a td:

if ($(this).find('td.specialclass').length)