我想创建一个div,它位于一个内容块的下面,但一旦页面已经滚动到足以接触其顶部边界,就会固定在原地并与页面滚动。


当前回答

我的解决方案有点啰嗦,但它处理变量定位从左边缘居中布局。

// Ensurs that a element (usually a div) stays on the screen
//   aElementToStick   = The jQuery selector for the element to keep visible
global.makeSticky = function (aElementToStick) {
    var $elementToStick = $(aElementToStick);
    var top = $elementToStick.offset().top;
    var origPosition = $elementToStick.css('position');

    function positionFloater(a$Win) {
        // Set the original position to allow the browser to adjust the horizontal position
        $elementToStick.css('position', origPosition);

        // Test how far down the page is scrolled
        var scrollTop = a$Win.scrollTop();
        // If the page is scrolled passed the top of the element make it stick to the top of the screen
        if (top < scrollTop) {
            // Get the horizontal position
            var left = $elementToStick.offset().left;
            // Set the positioning as fixed to hold it's position
            $elementToStick.css('position', 'fixed');
            // Reuse the horizontal positioning
            $elementToStick.css('left', left);
            // Hold the element at the top of the screen
            $elementToStick.css('top', 0);
        }
    }

    // Perform initial positioning
    positionFloater($(window));

    // Reposition when the window resizes
    $(window).resize(function (e) {
        positionFloater($(this));
    });

    // Reposition when the window scrolls
    $(window).scroll(function (e) {
        positionFloater($(this));
    });
};

其他回答

我和你有同样的问题,最终制作了一个jQuery插件来解决它。它实际上解决了人们在这里列出的所有问题,而且还增加了一些可选特性。

选项

stickyPanelSettings = {
    // Use this to set the top margin of the detached panel.
    topPadding: 0,

    // This class is applied when the panel detaches.
    afterDetachCSSClass: "",

    // When set to true the space where the panel was is kept open.
    savePanelSpace: false,

    // Event fires when panel is detached
    // function(detachedPanel, panelSpacer){....}
    onDetached: null,

    // Event fires when panel is reattached
    // function(detachedPanel){....}
    onReAttached: null,

    // Set this using any valid jquery selector to 
    // set the parent of the sticky panel.
    // If set to null then the window object will be used.
    parentSelector: null
};

https://github.com/donnyv/sticky-panel

演示:http://htmlpreview.github.io/?https: / / github.com/donnyv/sticky-panel/blob/master/jquery.stickyPanel/Main.htm

粘到页脚碰到div:

function stickyCostSummary() {
    var stickySummary = $('.sticky-cost-summary');
    var scrollCostSummaryDivPosition = $(window).scrollTop();
    var footerHeight = $('#footer').height();
    var documentHeight = $(document).height();
    var costSummaryHeight = stickySummary.height();
    var headerHeight = 83;
    var footerMargin = 10;
    var scrollHeight = 252;
    var footerPosition = $('#footer').offset().top;

    if (scrollCostSummaryDivPosition > scrollHeight && scrollCostSummaryDivPosition <= (documentHeight - footerHeight - costSummaryHeight - headerHeight - footerMargin)) {
        stickySummary.removeAttr('style');
        stickySummary.addClass('fixed');

    } else if (scrollCostSummaryDivPosition > (documentHeight - footerHeight - costSummaryHeight - headerHeight - footerMargin)) {
        stickySummary.removeClass('fixed');
        stickySummary.css({
          "position" : "absolute",
          "top" : (documentHeight - footerHeight - costSummaryHeight - headerHeight - footerMargin - scrollHeight) + "px"
      });
    } else {
        stickySummary.removeClass('fixed');
        stickySummary.css({
            "position" : "absolute",
            "top" : "0"
        });
    }
}

$window.scroll(stickyCostSummary);

你可以添加额外的3行,这样当用户滚动回顶部时,div将保持在原来的位置:

代码如下:

if ($(this).scrollTop() < 200 && $el.css('position') == 'fixed'){
    $('.fixedElement').css({'position': 'relative', 'top': '200px'});
}

我在搜索同样的东西时发现了这个。我知道这是一个老问题,但我想我可以提供一个最近的答案。

Scrollorama有一个“pin it”功能,这正是我正在寻找的。

http://johnpolacek.github.io/scrollorama/

最简单的解决方案(没有js): 演示

.container {
  position: relative;
}
.sticky-div {
    position: sticky;
    top: 0;
}
<div class="container">
  <h1>
    relative container & sticky div
  </h1>
  <div class="sticky-div"> this row is sticky</div>
  <div>
    content
  </div>
</div>