Autoscroll to bottom of page then top and repeat

Question

I have created a dashboard which echos out all the rows but I want an auto scroll which will slowly scroll down the bottom of the page and then scroll slowly back to the top and repeat. I have googled this and can't get a working code. I have been looking for jQuery codes but anything will do.

Because the page will adjust all the time it cant have fixed height scroll.

Not sure if you need more information but if you do I will update this question.

Regards Gambit

Well tried just auto scroll to bottom of page but that didnt work. function pageScroll() { window.scrollBy(0,1); scrolldelay = setTimeout('pageScroll()',10); } — TheGambit, Sep 18 '12 at 13:17
See my answer below, using the callback of the animate function allows you to have two methods calling back and forth to each other so it repeatedly scrolls up and down. — CaffGeek, Sep 18 '12 at 13:34

TimTastic · Accepted Answer · 2012-09-18T13:47:22.177

9

You could use something like this.

//run instantly and then goes after (setTimeout interval)

    $("html, body").animate({ scrollTop: $(document).height() }, 4000);
    setTimeout(function() {
       $('html, body').animate({scrollTop:0}, 4000); 
    },4000);
  var scrolltopbottom =  setInterval(function(){
         // 4000 - it will take 4 secound in total from the top of the page to the bottom
    $("html, body").animate({ scrollTop: $(document).height() }, 4000);
    setTimeout(function() {
       $('html, body').animate({scrollTop:0}, 4000); 
    },4000);

    },8000);

//Use this to stop the scroller -> clearInterval(scrolltopbottom);

Example: http://jsfiddle.net/NaP8D/11/

edited Sep 18 '12 at 13:47

answered Sep 18 '12 at 13:16

TimTastic

373
4
10

That works but how do I reduce the speed when it scrolls down? – TheGambit Sep 18 '12 at 13:22
@TheGambit If i understand you correctly you need to make use of easing in the animate method. You need to change it from linear to something else. Include jquery ui for some alternatives: http://jqueryui.com/demos/effect/easing.html – Johan Sep 18 '12 at 13:25
Edit look at my update post. just increase or decrease "4000" value to whatever speed and interval you want. – TimTastic Sep 18 '12 at 13:27
Thats great thanks. Can you just comment on what each of the 4000 number represents? – TheGambit Sep 18 '12 at 13:36
Updated my post again with explination. Enjoy! :) – TimTastic Sep 18 '12 at 13:40
Thanks Tim. Just reading your final line in the code. Is it possible to use a key such as spacebar to toggle the scrolling on and off? – TheGambit Sep 18 '12 at 14:01
Yes its possible. http://stackoverflow.com/questions/2249203/check-if-the-spacebar-is-being-pressed-and-the-mouse-is-moving-at-the-same-time – TimTastic Sep 18 '12 at 14:48

score 2 · Answer 2 · answered Apr 12 '17 at 08:51

you should try this for better result

//run instantly and then goes after (setTimeout interval)

$("html, body").animate({ scrollTop: $(document).height() }, 4000);

setTimeout(function() {
   $('html, body').animate({scrollTop:0}, 4000); 
},4000);


setInterval(function(){
     // 4000 - it will take 4 secound in total from the top of the page to the bottom
$("html, body").animate({ scrollTop: $(document).height() }, 4000);
setTimeout(function() {
   $('html, body').animate({scrollTop:0}, 4000); 
},4000);
    
},8000);


$('html, body').mouseover(function(e) {
$(this).stop(true);
      
    }).mouseout(function() {
         $(this).stop(false);
    });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<div style="height:2000px; float:left; width:100%;">
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</div>

http://jsfiddle.net/neelu/gvvnd0tt/8/

CaffGeek · Answer 3 · 2012-09-18T13:42:58.650

1

Here, this should work good, just change 5000 to the time in ms to adjust the speed.

http://jsfiddle.net/BDc6S/3/

function scrollDown(el) {
    el.animate({
        scrollTop: el[0].scrollHeight
    }, 5000, function() {
        scrollUp(el)
    });
};

function scrollUp(el) {
    el.animate({
        scrollTop: 0
    }, 5000, function() {
        scrollDown(el);
    });
};

scrollDown($("html,body"));

edited Sep 18 '12 at 13:42

answered Sep 18 '12 at 13:28

CaffGeek

21,856
17
100
184

3

The pause between stop and start scrolling seems to increase for every loop. – dbd Jan 08 '18 at 20:17

score -1 · Answer 4 · answered Dec 10 '15 at 16:58

-1

function doSomething() {
  $(document).scrollTop($(document).height());
}
setInterval(doSomething, 5000);

This will scroll to bottom of the page every 5 seconds. This will be useful, if you have auto load content based on user scroll like facebook.

answered Dec 10 '15 at 16:58

FreeBird

230
2
4

Autoscroll to bottom of page then top and repeat

4 Answers4

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