Question

My brain its going to explode.. why this dont work? im trying to animate a few divs with time interval and trying to write less code but this dont work

    var cargaCont = function(){
        o = 1;
        var animacion = function(i){
            $('#page2txt'+i).animate({
                height:'20'
            },200,function(){
                $('#page2img'+i).animate({
                    left:'0',
                    right:'0'
                },200,function(){
                    i++;
                    return i;
                });
            });
        }
        while(o < 3){
            setTimeout(function(){o = animacion(o);},200);
        }   
    }

Answer 1

The problem with this code:

while(o < 3){
    setTimeout(function(){o = animacion(o);},200);
} 

is by the time the functions delayed by setTimeout are executed, o is already 3 and therefore all calls to animacion pass 3 instead of 1 and 2.

To circumvent this problem, you should “localize” the value of o by using an immediate function.

while(o < 3){
    //o out here is from cargaCont
    (function(o){
        //override o by naming the passed variable o
        setTimeout(function(){
            o = animacion(o); //now o refers to the local o
        },200);
    }(o)); //execute inner function, passing in o
} 

This makes the o used by the functions in setTimeoutto be bound to the o of the local function and not the o of the cargaCont function.