How to make div fixed after you scroll to that div

问题:

How to make a div remain fixed after you scroll to that div? I have a div that is later in a page and you need to scroll to get to that div.

If I use:

.divname {
  position: fixed;
}

The div will appear before it should appear normally. Maybe a good example of what I need is second ad on 9gag. If your screen resolution is low enough, you won't see that ad after you load the front page, but after you scroll down, you'll see the second ad and it will remain fixed while you scroll down.

回答1:

I know this is tagged html/css only, but you can't do that with css only. Easiest way will be using some jQuery.

var fixmeTop = $('.fixme').offset().top;       // get initial position of the element

$(window).scroll(function() {                  // assign scroll event listener

    var currentScroll = $(window).scrollTop(); // get current position

    if (currentScroll >= fixmeTop) {           // apply position: fixed if you
        $('.fixme').css({                      // scroll to that element or below it
            position: 'fixed',
            top: '0',
            left: '0'
        });
    } else {                                   // apply position: static
        $('.fixme').css({                      // if you scroll above it
            position: 'static'
        });
    }

});

http://jsfiddle.net/5n5MA/2/

回答2:

jquery function is most important

<script>
$(function(){
    var stickyHeaderTop = $('#stickytypeheader').offset().top;

    $(window).scroll(function(){
            if( $(window).scrollTop() > stickyHeaderTop ) {
                    $('#stickytypeheader').css({position: 'fixed', top: '0px'});
                    $('#sticky').css('display', 'block');
            } else {
                    $('#stickytypeheader').css({position: 'static', top: '0px'});
                    $('#sticky').css('display', 'none');
            }
    });
});
</script>

Then use JQuery Lib...

<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>

Now use HTML

<div id="header">
    <p>This text is non sticky</p>
    <p>This text is non sticky</p>
    <p>This text is non sticky</p>
    <p>This text is non sticky</p>
 </div>

<div id="stickytypeheader">
 <table width="100%">
  <tr>
    <td><a href="http://growthpages.com/">Growth pages</a></td>

    <td><a href="http://google.com/">Google</a></td>

    <td><a href="http://yahoo.com/">Yahoo</a></td>

    <td><a href="http://www.bing.com/">Bing</a></td>

    <td><a href="#">Visitor</a></td>
  </tr>
 </table>
</div>

<div id="content">
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua. Ut enim ad minim veniam, quis nostrud exercitation
ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis
aute irure dolor in reprehenderit in voluptate velit esse
cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt
mollit anim id est laborum.</p>
</div>

Check DEMO HERE

回答3:

<script>
if($(window).width() >= 1200){
    (function($) {
        var element = $('.to_move_content'),
            originalY = element.offset().top;

        // Space between element and top of screen (when scrolling)
        var topMargin = 10;

        // Should probably be set in CSS; but here just for emphasis
        element.css('position', 'relative');

        $(window).on('scroll', function(event) {
            var scrollTop = $(window).scrollTop();

            element.stop(false, false).animate({
                top: scrollTop < originalY
                    ? 0
                    : scrollTop - originalY + topMargin
            }, 0);
        });
    })(jQuery);
}

Try this ! just add class .to_move_content to you div

回答4:

it worked for me

$(document).scroll(function() {
    var y = $(document).scrollTop(), //get page y value 
        header = $("#myarea"); // your div id
    if(y >= 400)  {
        header.css({position: "fixed", "top" : "0", "left" : "0"});
    } else {
        header.css("position", "static");
    }
});

回答5:

This is possible with CSS3. Just use position: sticky, as seen here.

position: -webkit-sticky; /* Safari & IE */
position: sticky;
top: 0;