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How to make div follow scrolling smoothly with jQuery?

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我寻月下人不归
我寻月下人不归 2020-11-28 19:24

In my container there are sections/boxes, but the last one of these boxes should follow scrolling when none of the other boxes are visible.

So, when user sc

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10条回答
  • 清酒与你
    2020-11-28 19:29

    This one is same on facebook: 

    <script>
var valX = $(window).scrollTop();
function syncScroll(target){
	var valY = $(window).scrollTop();
	var difYX = valY - valX;
	var targetX = $(target).scrollTop();
	if(valY > valX){
		$(target).scrollTop(difYX);
	}
	if(difYX <= 0){
		$(target).scrollTop(-20);
	}
}

$(window).scroll(function(){
	syncScroll('#demo');
})
</script>
    body{
  margin:0;
  padding:0;
  height:100%;
}
#demo{
  position:fixed;
  height:100vh;
  overflow:hidden;
  width:40%;
}
#content{
  position:relative;
  float:right;
  width:60%;
  color:red; 
}
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<body>
  <div id="demo">
    <ul>
      <li>
        <p>"Lorem ipsum dolor sit amet, consectetur adipiscing 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>
      </li>
      <li>
        <p>
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
        </p>
      </li>  
      <li>
        <p>
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?"
        </p>
      </li>
    <ul>
  </div>
  <div id="content">
    <ul>
      <li>
        <p>"Lorem ipsum dolor sit amet, consectetur adipiscing 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>
      </li>
      <li>
        <p>
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
        </p>
      </li>  
      <li>
        <p>
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?"
        </p>
      </li>
      <li>
        <p>"Lorem ipsum dolor sit amet, consectetur adipiscing 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>
      </li>
      <li>
        <p>
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
        </p>
      </li>  
      <li>
        <p>
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?"
        </p>
      </li>
      <li>
        <p>"Lorem ipsum dolor sit amet, consectetur adipiscing 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>
      </li>
      <li>
        <p>
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
        </p>
      </li>  
      <li>
        <p>
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?"
        </p>
      </li>
      <li>
        <p>"Lorem ipsum dolor sit amet, consectetur adipiscing 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>
      </li>
      <li>
        <p>
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
        </p>
      </li>  
      <li>
        <p>
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?"
        </p>
      </li>
    <ul>
   </div>   
</body

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  • 温柔的废话
    2020-11-28 19:33

    Since this question is getting a lot of views and the tutorial linked in the most voted answer appears to be offline, I took the time to clean up this script.

    See it live here: JSFiddle

    JavaScript:

    (function($) {
    var element = $('.follow-scroll'),
        originalY = element.offset().top;

    // Space between element and top of screen (when scrolling)
    var topMargin = 20;

    // 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
        }, 300);
    });
})(jQuery);
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  • 不要未来只要你来
    2020-11-28 19:33

    There's a fantastic jQuery tutorial for this at https://web.archive.org/web/20121012171851/http://jqueryfordesigners.com/fixed-floating-elements/.

    It replicates the Apple.com shopping cart type of sidebar scrolling. The Google query that might have served you well is "fixed floating sidebar".

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  • 被撕碎了的回忆
    2020-11-28 19:35

    Here is mine solution (hope it is plug-n-play enough too):

    1. Copy JS code part
    2. Add 'slide-along-scroll' class to element you want
    3. Make pixel-perfect corrections in JS-code
    4. Hope you will enjoy it!

    // SlideAlongScroll
var SlideAlongScroll = function(el) {
  var _this = this;
  this.el = el;
  // elements original position
  this.elpos_original = el.parent().offset().top;  
  // scroller timeout
  this.scroller_timeout;
  // scroller calculate function
  this.scroll = function() {
    // 20px gap for beauty
    var windowpos = $(window).scrollTop() + 20;
    // targeted destination
    var finaldestination = windowpos - this.elpos_original;
    // define stopper object and correction amount
    var stopper = ($('.footer').offset().top); // $(window).height() if you dont need it
    var stophere = stopper - el.outerHeight() - this.elpos_original - 20;
    // decide what to do
    var realdestination = 0;
    if(windowpos > this.elpos_original) {
      if(finaldestination >= stophere) {
        realdestination = stophere;
      } else {
        realdestination = finaldestination;
      }
    }
    el.css({'top': realdestination });
  };
  // scroll listener
  $(window).on('scroll', function() {
    // debounce it
    clearTimeout(_this.scroller_timeout);
    // set scroll calculation timeout
    _this.scroller_timeout = setTimeout(function() { _this.scroll(); }, 300);
  });
  // initial position (in case page is pre-scrolled by browser after load)
  this.scroll();
};
// init action, little timeout for smoothness
$(document).ready(function() {
  $('.slide-along-scroll').each(function(i, el) {
    setTimeout(function(el) { new SlideAlongScroll(el); }, 300, $(el));
  });
});
    /* part you need */
.slide-along-scroll {
  padding: 20px;
  background-color: #CCCCCC;
	transition: top 300ms ease-out;
	position: relative;
}
/* just demo */
div {  
  box-sizing: border-box;
}
.side-column {
  float: left;
  width: 20%;    
}
.main-column {
  padding: 20px;
  float: right;
  width: 75%;
  min-height: 1200px;
  background-color: #EEEEEE;
}
.body {  
  padding: 20px 0;  
}
.body:after {
  content: ' ';
  clear: both;
  display: table;
}
.header {
  padding: 20px;
  text-align: center;
  border-bottom: 2px solid #CCCCCC;  
}
.footer {
  padding: 20px;
  border-top: 2px solid #CCCCCC;
  min-height: 300px;
}
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
  <div class="header">
      <h1>Your super-duper website</h1>
  </div>
  <div class="body">  
    <div class="side-column">
        <!-- part you need -->
        <div class="slide-along-scroll">
            Side menu content
            <ul>
               <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
               <li>Aliquam tincidunt mauris eu risus.</li>
               <li>Vestibulum auctor dapibus neque.</li>
            </ul>         
        </div>
    </div>
    <div class="main-column">
        Main content area (1200px)
    </div>
  </div>
  <div class="footer">
      Footer (slide along is limited by it)
  </div>
</div>

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  • 梦谈多话
    2020-11-28 19:41

    The solution can be boiled down to this:

    var el=$('#follow-scroll');
var elpos=el.offset().top;
$(window).scroll(function () {
    var y=$(this).scrollTop();
    if(y<elpos){el.stop().animate({'top':0},500);}
    else{el.stop().animate({'top':y-elpos},500);}
});

    I have changed the assignment of el because finding a single element by class is not a great habit to get in to; if you only want one element find it by id, if you want to iterate over a collection of elements then find them by class.

    please note - my answer here refers to the accepted answer at that time (it still is the accepted answer at the moment, but has since been edited and therefore my answer no longer "boils down" what you see in @Martti Lane's answer on this page; my answer "boils down" his original, accepted, answer; you can take a look at the edit history of @Martti's answer if you're interested in what I "boiled down".)

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  • 无人共我
    2020-11-28 19:43

    This worked for me like a charm.

    JavaScript:

    $(function() { //doc ready
    if (!($.browser == "msie" && $.browser.version < 7)) {
        var target = "#floating", top = $(target).offset().top - parseFloat($(target).css("margin-top").replace(/auto/, 0));
        $(window).scroll(function(event) {
            if (top <= $(this).scrollTop()) {
                $(target).addClass("fixed");
            } else {
                $(target).removeClass("fixed");
            }
        });
    }
});

    CSS:

    #floating.fixed{
    position:fixed;
    top:0;
}

    Source: http://jqueryfordesigners.com/fixed-floating-elements/

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