Question

Is there a way to test if a certain element (.container) is hidden, in a whole document? Such as (which doesn’t work properly):

$(".showall").click(
    function () {
        if ($(".container").is("hidden"))
                {perform a task}
            else
                {return false;}
    });

Answer 1

It sounds like you want to test if at least one of the .container elements is hidden.

If so, you can use the :hidden selector, and check the length property to see how many were returned.

$(".showall").click(
    function () {
        if ($(".container:hidden").length)
             // found at least one hidden
        else
             // didn't find any hidden
    });

If you wanted to test to see if all were hidden, use the :visible selector like this:

$(".showall").click(
    function () {
        if ($(".container:visible").length)
             // found at least one visible
        else
             // didn't find any visible
    });