这是MarsAndBack和Miftah Mizwar回答的延续。

他们的答案是正确的。但是，很难确定问题的始祖。

简单来说，只需在浏览器控制台中运行这个jQuery脚本，它就会告诉您每个祖先上overflow属性的值。

$('.your-sticky-element').parents().filter(function() {
    console.log($(this));
    console.log($(this).css('overflow'));
    return $(this).css('overflow') === 'hidden';
});

如果一个祖先没有溢出:可见改变它的CSS使它有!

同样，正如在其他地方所述，确保你的sticky元素在CSS中有这个:

.your-sticky-element {
    position: sticky;
    top: 0;
}

如果你遇到这种情况，你的粘性不工作-试着设置父:

display: unset

为我工作

粘性定位是相对定位和固定定位的混合体。元素被视为相对定位，直到它超过指定的阈值，此时它被视为固定定位。 .．. 您必须指定一个阈值，其中至少有一个是上、右、下或左，以便粘滞定位按预期的方式工作。否则，它将与相对定位难以区分。 (来源:中数)

在你的例子中，你必须通过使用top属性来定义它最后应该停留的位置。

html, body { height: 200%; } nav { position: sticky; position: -webkit-sticky; top: 0; /* required */ } .nav-selections { text-transform: uppercase; letter-spacing: 5px; font: 18px "lato", sans-serif; display: inline-block; text-decoration: none; color: white; padding: 18px; float: right; margin-left: 50px; transition: 1.5s; } .nav-selections:hover { transition: 1.5s; color: black; } ul { background-color: #B79b58; overflow: auto; } li { list-style-type: none; } <nav> <ul align="left"> <li><a href="#/contact" class="nav-selections" style="margin-right:35px;">Contact</a></li> <li><a href="#/about" class="nav-selections">About</a></li> <li><a href="#/products" class="nav-selections">Products</a></li> <li><a href="#" class="nav-selections">Home</a></li> </ul> </nav>

我还遇到了一些事情:

当你的sticky元素是一个组件时(angular等)

如果“sticky”元素本身是一个带有自定义元素选择器的组件，比如一个名为<app-menu-bar>的angular组件，你需要在该组件的css中添加以下内容: :主机{显示:块;} //或使用flexbox

or

    app-menu-bar  { display: block; }   // (in the containing component's css)

Safari on iOS in particular seems to require `display:block` even on the root element `app-root` of an angular application or it won't stick.

If you are creating a component and defining the css inside the component (shadow DOM / encapsulated styles), make sure the position: sticky is being applied to the 'outer' selector (eg. app-menu-bar in devtools should show the sticky position) and not a top level div within the component. With Angular, this can be achieved with the :host selector in the css for your component. :host { position: sticky; display: block; // this is the same as shown above top: 0; background: red; }

其他

If the element following your sticky element has a solid background, you must add the following to stop it from sliding underneath: .sticky-element { z-index: 100; } .parent-of-sticky-element { position: relative; } Your sticky element must be before your content if using top and after it if using bottom. There are complications when using overflow: hidden on your wrapper element – in general it will kill the sticky element inside. Better explained in this question Mobile browsers may disable sticky/fixed positioned items when the onscreen keyboard is visible. I'm not sure of the exact rules (does anybody ever know) but when the keyboard is visible you're looking at a sort of 'window' into the window and you won't easily be able to get things to stick to the actual visible top of the screen. Make sure you have: position: sticky; and not display: sticky;

杂项可用性问题

Be cautious if your design calls for for sticking things to the bottom of the screen on mobile devices. On iPhone X for instance they display a narrow line to indicate the swipe region (to get back to the homepage) - and elements inside this region aren't clickable. So if you stick something there be sure to test on iPhone X that users can activate it. A big 'Buy Now' button is no good if people can't click it! If you're advertising on Facebook the webpage is displayed in a 'webview' control within Facebook's mobile apps. Especially when displaying video (where your content begins in the bottom half of the screen only) - they often completely mess up sticky elements by putting your page within a scrollable viewport that actually allows your sticky elements to disappear off the top of the page. Be sure to test in the context of an actual ad and not just in the phone's browser or even Facebook's browser which can all behave differently.

我相信这篇文章说了很多关于粘性的工作原理

How CSS Position Sticky Really Works! CSS position sticky has two main parts, sticky item & sticky container. Sticky Item — is the element that we defined with the position: sticky styles. The element will float when the viewport position matches the position definition, for example: top: 0px . Sticky Container —is the HTML element which wraps the sticky item. This is the maximum area that the sticky item can float in. When you define an element with position: sticky you’re automatically defining the parent element as a sticky container!

这是什么绊倒了我…我的粘性div是在另一个div，所以父div需要一些额外的内容后粘性div，使父div“足够高”的粘性div，以“滑过”其他内容，因为你向下滚动。

所以在我的情况下，在黏黏的div之后，我必须添加:

    %div{style:"height:600px;"} 
       

(我的应用程序有两个并排的div，左边是一个“高”图像，右边是一个短的数据输入表单，我希望当你向下滚动时，数据输入表单漂浮在图像旁边，这样表单就总是在屏幕上。它不会工作，直到我添加了上面的“额外内容”，这样粘性div就有东西可以“滑动”