Yellow fade effect with JQuery

Question

I would like to implement something similar to 37Signals\'s Yellow Fade effect.

I am using Jquery 1.3.2

The code

(function($) {
   $.fn.yell         


        

Answer 1

Actually, I have a solution that only needs jQuery 1.3x, and no aditionnal plugin.

First, add the following functions to your script

function easeInOut(minValue,maxValue,totalSteps,actualStep,powr) {
    var delta = maxValue - minValue;
    var stepp = minValue+(Math.pow(((1 / totalSteps)*actualStep),powr)*delta);
    return Math.ceil(stepp)
}

function doBGFade(elem,startRGB,endRGB,finalColor,steps,intervals,powr) {
    if (elem.bgFadeInt) window.clearInterval(elem.bgFadeInt);
    var actStep = 0;
    elem.bgFadeInt = window.setInterval(
        function() {
            elem.css("backgroundColor", "rgb("+
                easeInOut(startRGB[0],endRGB[0],steps,actStep,powr)+","+
                easeInOut(startRGB[1],endRGB[1],steps,actStep,powr)+","+
                easeInOut(startRGB[2],endRGB[2],steps,actStep,powr)+")"
            );
            actStep++;
            if (actStep > steps) {
            elem.css("backgroundColor", finalColor);
            window.clearInterval(elem.bgFadeInt);
            }
        }
        ,intervals)
}

Next, call the function using this:

doBGFade( $(selector),[245,255,159],[255,255,255],'transparent',75,20,4 );

I'll let you guess the parameters, they are pretty self explanatory. To be honest the script is not from me, I took it on a page then changed it so it works with the latest jQuery.

NB: tested on firefox 3 and ie 6 (yes it works on that old thing too)