Execute function on Scroll jQuery

问题

I'm misunderstanding the scroll() function. I'm wishing to if a panel is open execute a function if the main window is scrolled up or down. This is my code that does nothing.

if('#specsallA:visible').scroll(function(){
              $('#specsbar').animate({
          width:'190px'
          }, '500'); $('.products').animate({
          width:'168px'
          }, '500'); $('#specsallA').hide();  $('#specsall').show();
          });

Any ideas,

Marvellous

回答1:

A slight misunderstanding. Easiest way is to put your if() test inside the event callback

$(window).scroll(function() {
    if ($('#specsallA').is(':visible')) {
        // do your special stuff here
    }
});

回答2:

I think you want something more like:

$(window).scroll(function(){
   doSomething();
})

来源：https://stackoverflow.com/questions/5477338/execute-function-on-scroll-jquery