jQuery - How can I continue an animation while the mouse hovers over an element?

Question

I need a way to perform some kind of \'whileonmouseover\' function to continue an animation while the mouse overs over an element...

For example, given this function

Answer 1

I would suggest to move the following part outside the scope of the $(document).ready() function:

var doLoop = true;

function doAlert()
{
    if (!doLoop) return;

    alert(1);
    doAlert();
}

So try this code instead:

var doLoop = true;

function doAlert()
{
    if (!doLoop) return;

    alert(1);
    doAlert();
}

$(document).ready(function()
{
    $('#button').hover(function()
    {
        doAlert();
    }, function()
    {
        doLoop = false;
    });
});

Answer 2

I'd recommend setting an interval instead of recursing because, assuming the final solution isn't just alerting but is doing something non-blocking, recursing while hovering can quickly cause memory hogging and unresponsiveness.

Something like:

var hoverInterval;

function doStuff() {
    // Set button's background to a random color
    $("#button").css("background", "#" + Math.floor(Math.random() * 16777215).toString(16));
}

$(function() {
    $("#button").hover(
        function() {
            // call doStuff every 100 milliseconds
            hoverInterval = setInterval(doStuff, 100);
        },
        function() {
            // stop calling doStuff
            clearInterval(hoverInterval);
        }
    );
});