Using jQuery, what selector do I use to get the last thead tr for each matching table?

On a single page, I have two tables. Each of them has a class of "data". Each of them has theads.

I want to apply formatting to the last row in each of the table's theads.

I originally had this:

$('table.data thead tr:last').children().addClass('col');

Which works fine if there is only one table on the page. But if there are multiple tables, that tr:last selector picks up the last开发者_运维知识库 tr for ALL of the tables matching the class, not EACH table.

How do I constrain this to operate on the last tr for each thead?

Thanks!

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Use the :last-child selector instead to get the one in each <thead>, like this:

$('table.data thead tr:last-child').children().addClass('col');
//or possibly:
$('table.data thead tr:last-child > td').addClass('col');