我正在寻找一个简单的，跨浏览器“滚动到顶部”的动画，我可以应用到一个链接。我不想需要一个JS库，如jQuery/Moo等。
// jQuery Equivilant to convert to pure JS...
$('html, body').animate({scrollTop:0}, 400);
对于那些在跳进图书馆之前应该100%学习JS的人来说，我是一个完美的例子。：(
当前回答
function scrollTo(element, to, duration) {
if (duration <= 0) return;
var difference = to - element.scrollTop;
var perTick = difference / duration * 10;
setTimeout(function() {
element.scrollTop = element.scrollTop + perTick;
if (element.scrollTop === to) return;
scrollTo(element, to, duration - 10);
}, 10);
}
演示:
function runScroll() { scrollTo(document.body, 0, 600); } var scrollme; scrollme = document.querySelector("#scrollme"); scrollme.addEventListener("click",runScroll,false) function scrollTo(element, to, duration) { if (duration <= 0) return; var difference = to - element.scrollTop; var perTick = difference / duration * 10; setTimeout(function() { element.scrollTop = element.scrollTop + perTick; if (element.scrollTop == to) return; scrollTo(element, to, duration - 10); }, 10); } <p>Very long page.Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. Very long page. 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其他回答
实际上有一个纯javascript的方式来完成这个不使用setTimeout或requestAnimationFrame或jQuery。
简而言之，在scrollView中找到要滚动到的元素，并使用scrollIntoView
el.scrollIntoView({行为:“平滑”});
这是一个普朗克。
改编自下面的回答:
function scroll(y, duration) {
var initialY = document.documentElement.scrollTop || document.body.scrollTop;
var baseY = (initialY + y) * 0.5;
var difference = initialY - baseY;
var startTime = performance.now();
function step() {
var normalizedTime = (performance.now() - startTime) / duration;
if (normalizedTime > 1) normalizedTime = 1;
window.scrollTo(0, baseY + difference * Math.cos(normalizedTime * Math.PI));
if (normalizedTime < 1) window.requestAnimationFrame(step);
}
window.requestAnimationFrame(step);
}
这应该允许你平滑地滚动(余弦函数)从任何地方到指定的“y”。
我看到上面大多数/所有的帖子都是用javascript搜索按钮的。这是有效的，只要你只有一个按钮。我建议在按钮内定义一个“onclick”元素。然后，“onclick”将调用该函数，使其滚动。
如果你这样做，你可以使用多个按钮，只要按钮看起来像这样:
<button onclick="scrollTo(document.body, 0, 1250)">To the top</button>
没有人提到CSS属性滚动行为
CSS
html {
scroll-behavior: smooth;
}
JS
window.scrollTo(0,0)
没有JQuery代码，希望这将帮助你。
function TopscrollTo() {
if(window.scrollY!=0)
{
setTimeout(function() {
window.scrollTo(0,window.scrollY-30);
TopscrollTo();
}, 100);
}
}
在按钮单击事件或任何其他你想要的元素/事件上调用这个TopscrollTo()函数。
