问题:

I have a dropdown menu that works fine, but I would like it so, that if I hover off the menu, it doesn't immediately hide again. So basically I would like a one second delay.

I have read about setTimeout, but not sure if it is what I need?

$('#mainnav a').bind('mouseover', function()
{
    $(this).parents('li').children('ul').show();
});

$('#mainnav a').bind('mouseout', function()
{
    $(this).parents('li').children('ul').hide();
});

回答1:

setTimeout is exactly what you need.

$('#mainnav a').bind('mouseout', function()
{
    var menu = this;
    setTimeout(function()
    {
        $(menu).parents('li').children('ul').hide();
    }, 1000);
});

回答2:

For mouseout I would add a chained animation before the hide() call:

$('#mainnav a').bind('mouseout', function()
{
    $(this).parents('li').children('ul').animate({opacity:0.99}, 2000).hide();
});

which would give a delay of 2 seconds.

回答3:

Specify "slow" as a parameter to show and hide. From JQuery Docs.

$('#mainnav a').bind('mouseover', function()
{
    $(this).parents('li').children('ul').show("slow");
});

$('#mainnav a').bind('mouseout', function()
{
    $(this).parents('li').children('ul').hide("slow");
});