html - 仅使用 CSS/HTML 平滑滚动到页面顶部？

Question

我不允许将 Jquery/Javascript 添加到该站点，因此我正在寻找任何方法来执行“返回顶部”按钮，并仅使用 CSS/HTML 将其转换到顶部....不要想这是可能的，但要检查是否有人遇到了解决方案。

score 10 · Accepted Answer

它不会是一个平滑的滚动，但你可以使用一个 achor 标签链接到页面的任何部分。这是 W3 学校的一个例子。

<!DOCTYPE html>
<html>
<body>

<h2><a id="top">There is a link at the bottom of the page!</a></h2>

<p>In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since.</p>
<p>"Whenever you feel like criticizing any one," he told me, "just remember that all the people in this world haven't had the advantages that you've had."</p>
<p>He didn't say any more, but we've always been unusually communicative in a reserved way, and I understood that he meant a great deal more than that. In consequence, I'm inclined to reserve all judgments, a habit that has opened up many curious natures to me and also made me the victim of not a few veteran bores. The abnormal mind is quick to detect and attach itself to this quality when it appears in a normal person, and so it came about that in college I was unjustly accused of being a politician, because I was privy to the secret griefs of wild, unknown men. Most of the confidences were unsought-frequently I have feigned sleep, preoccupation, or a hostile levity when I realized by some unmistakable sign that an intimate revelation was quivering on the horizon; for the intimate revelations of young men, or at least the terms in which they express them, are usually plagiaristic and marred by obvious suppressions. Reserving judgments is a matter of infinite hope. I am still a little afraid of missing something if I forget that, as my father snobbishly suggested, and I snobbishly repeat, a sense of the fundamental decencies is parcelled out unequally at birth.</p>
<p>And, after boasting this way of my tolerance, I come to the admission that it has a limit. Conduct may be founded on the hard rock or the wet marshes, but after a certain point I don't care what it's founded on. When I came back from the East last autumn I felt that I wanted the world to be in uniform and at a sort of moral attention forever; I wanted no more riotous excursions with privileged glimpses into the human heart. Only Gatsby, the man who gives his name to this book, was exempt from my reaction-Gatsby, who represented everything for which I have an unaffected scorn. If personality is an unbroken series of successful gestures, then there was something gorgeous about him, some heightened sensitivity to the promises of life, as if he were related to one of those intricate machines that register earthquakes ten thousand miles away. This responsiveness had nothing to do with that flabby impressionability which is dignified under the name of the "creative temperament"-it was an extraordinary gift for hope, a romantic readiness such as I have never found in any other person and which it is not likely I shall ever find again. No-Gatsby turned out all right at the end; it is what preyed on Gatsby, what foul dust floated in the wake of his dreams that temporarily closed out my interest in the abortive sorrows and short-winded elations of men.</p>

<a href="#top">Go to top</a>
</body>
</html>

基本上，href 使用 css 选择器来决定要转到哪个锚点

更新：所以我发现了一个关于平滑滚动的有趣链接，我想我会在这个问题上发布它。

score 5 · Accepted Answer

据我所知，仅使用 CSS 无法实现平滑的页面转换。正如aaronman所说，您可以使用 HTML 属性id来帮助跳转到页面上的不同位置。你给元素一个id，它可以是你想要的任何东西

<h1 id="whatever">Jump to me</div>

然后在页面的某个地方，你可以使用一个锚标签来跳转到这个。

<a href="#whatever">Jump to "Jump to me"</a>

小提琴

其工作方式与定位 CSS 中的元素非常相似。您使用 id 定位它，然后href将带您到那里。这对于目录等项目很有帮助。如果您正在制作诸如目录之类的内容，并且想要显示您已跳转到某个部分，则可以使用:target伪类来完成此操作。这是一个非常基本的例子。

你可以在没有元素跳转的情况下做到这一点的方法是给出aan hrefof #。这将直接跳转到页面顶部。几乎就像<html>页面有一个idof #。

小提琴

score 1 · Accepted Answer

为了通过 CSS 滚动到页面顶部，您必须添加某种触发器来更改 CSS。也就是说，AFAIK，只能通过 html 内联 JavaScript 触发器或 javascript 中的 EventListeners 实现。

但是，您可以通过锚点（）的设置跳转到页面上的某个点href=#the_id_of_an_element，但这并不平滑，而是瞬时的。

现在，我确实设法使某种平滑滚动到页面顶部，或者更确切地说是元素的开头，但是仅使用 CSS 会产生一些令人不安的副作用。不过，我会分享代码，看看它是否对任何人有帮助，或者有任何其他问题。

/*
	KNOWN ISSUES
	
	- requires constant user input.
	Either through hover or buttonpress
		-> If an element would be triggered, they cannot be untriggered. CSS is not made for this.
	
	- moves the page
	Well, what did you expect? CSS visualises the page. You can only move 
	the page through the CSS by editing visual content and making the page smaller,
	basically forcing the client to move the user.
		-> this also means that elements below the element are shown in the view
		-> it is VERY visible, especially if you look at the scrollbar
		
	- has a delay depending on where the user is at
	The animation has to reach the position of the user, basically.
		
	At least it works on IE?
	But honestly, just use javascript to scroll to. It's literally an one-liner
*/

/* Transition types. Fairly universal available in browsers*/
.smooth-transition {
	-webkit-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
    -ms-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    transition: all 0.5s ease;
}

.slow-transition {
    -webkit-transition: all 1.5s ease;
    -moz-transition: all 1.5s ease;
    -ms-transition: all 1.5s ease;
    -o-transition: all 1.5s ease;
    transition: all 1.5s ease;
}
/* End of transition types */

.bottom {
	position: fixed;
	/*Position wherever, just know that you can set sizes using these*/
	bottom: 0px;
	height: 40px;
	left: 0px;
	right: 0px;
	
	z-index: 10;
}

/*
	Settings for the transitions
	
	On active (which is click), the animation makes sure the page is made smaller, so 
	the top is shown again. This also causes the user to be moved upwards
	
	After that animation, the page is restored in size.
*/
#move:active ~ .mover,
#move:focus:hover ~ .mover {
	height: 0px;
}

#move:after {
	content: "Back to top";
}

#move:focus:after {
	content: "Hover to go up";
}

/* 
	The element that holds all the data
	It's required for this element to also be at the end of the page,
	otherwise the user will be moved upwards, but also with the end 
	of the page in sight. (This can be tweaked with the min-height 
	settings though. Height - height of whatever is beneath it, but
	the user will still see the other elements)
*/
.mover  {
	/*
		Min-height here is the amount of spacing between the element and 
		the top of the HTML page. In most cases, this is 100%, but if the
		element is contained, then this min-height trick might not work
		
		Just make sure that the min-height amount is the same as the visual 
		page size, and NOT its contents or its parent.
	*/
	min-height: 100%;
	/*
		Set to your div height. Unfortunately, animations from auto to
		0px are not supported (yet?), and there's no real good trick 
		as a placeholder for this one. You could mess around with 
		max-height, but remember that this can cause a delay in animation
		and creates differences in speed that are hard to tweak or measure.
	*/
	height: 1400px;
	
	/*
		In order to move the page, you'll have to suppress the content 
		that will be shown outside of the element. Ergo, hide the overflow.
	*/
	overflow: hidden;
}





/* To make the example element look pretty*/
#move:hover {
	color: whitesmoke;
	background-color: rgb(30,30,30);
}

#move {
	background-color: rgb(50,50,50);
	border-radius: 2px;
	text-align: center;
	line-height: 40px;
	color: lightslategrey;
	text-decoration: none;
}
/* 
	End of pretty CSS
*/

<link rel="stylesheet" href="test.css">
<html>
<h1>Welcome at the top</h1>
<a id="move" class="bottom" ></a>
<div class="mover slow-transition">
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Pri solet probatus at. Quo sint alienum ne. Reque malis sonet id mel, has enim mundi alienum.</p>
</div>
</html>

请务必阅读我在 CSS 中添加的注释，以便了解问题所在以及文件中所有内容的含义。不过，我相当肯定您几乎会立即注意到其中一种令人讨厌的副作用。

score 0 · Accepted Answer

我的平滑滚动按钮实现的 CSS 和 HTML如下。

// For smooth scrolling
@media (prefers-reduced-motion: no-preference) {
html {
 scroll-behavior: smooth;
 }
}

.back-to-top-wrapper {
  position: absolute;
  top: 100vh; // How far should the scroll travel prior to the link appearing
  right: 0.25rem;
  bottom: -5em;
  width: 3em;
}

.back-to-top-link {
  position: fixed;
  position: sticky;
  margin-left: 4rem;
  top: calc(100vh - 5rem);

  display: inline-block;
  text-align: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  padding: 0.25rem;

  border: 1px solid #000022;
  background-color: #77E4F9;
}

<div class="back-to-top-wrapper">
  <a href="#top" class="back-to-top-link">^</a>
</div>

score 0 · Accepted Answer

您可以使用scroll-behavior: smooth;onhtml元素以及div位于顶部的具有特定 id 的元素。您可以使用指向该特定 IDa的属性。href

#top {
  position: absolute;
  top: 0;
  left: 0;
}

body {
  height: 500vh;
  /*To simulate long page*/
}

html {
  scroll-behavior: smooth;
}

.topBtn {
  position: fixed;
  bottom: 2%;
  right: 2%;
}

<div id="top">
</div>

<div class="section">Top most Section</div>

<a href="#top" class="topBtn">Top</a>

html - 仅使用 CSS/HTML 平滑滚动到页面顶部？

5 回答 5

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