Can you check if $(this).addClass('selected') has already been added in jquery

Question

I have the following code:

    $("#UpdateTable tr").click(function ()
{
    $(this).addClass('selected').siblings().removeClass('selected');
});

It highlights a row in a table when that row is selected. Is there a way to check to see if the row is already selected or is the currently selected row?

I am trying to be able to select a row and have it be highlighted, then select that same row again and have the highlighting go away. But I'm new to jquery and don't know how to do the check.

Answer 1

$(this).hasClass('selected')

在这里阅读更多关于hasClass() 。

Answer 2

$("#UpdateTable tr").click(function ()
{
    if($(this).hasClass('selected'))
        $(this).removeClass('selected');
    else
        $(this).addClass('selected').siblings().removeClass('selected');
});