How to tell if something is scrolled into view?

2018-06-29 20:38:11

This question already has an answer here:

Check if element is visible after scrolling 38 answers

As has been posted multiple times here:

http://imakewebthings.com/jquery-waypoints/

does exactly what you are looking for.

Are you trying to get something like this
Edited DEMO

Script:

$(function(){
        var a;var c=false;
        var b=$("#popContent");
        var e=$(window);
        var d=$('#footer').position().top;
        e.scroll(function(){
            window.clearTimeout(a);
            a=window.setTimeout(function(){
            if(e.scrollTop()<=d){
              if(c==false)   { 
                  c=true;b.stop(true,true).show(); 
                  }else{
                         c=false;b.fadeOut(500)

            }}},100)})
});

链接地址: http://www.djcxy.com/p/83336.html

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