跨浏览器JavaScript（不是jQuery ...）滚动到顶部动画 [英] Cross browser JavaScript (not jQuery...) scroll to top animation

问题描述

我正在寻找一个简单的，跨浏览器的滚动到顶部动画，我可以应用于链接。我不想要一个JS库，如jQuery / Moo等。

I'm looking for a simple, cross-browser "scroll to top" animation I can apply to a link. I don't want to require a JS library such as jQuery/Moo, etc.

// jQuery Equivilant to convert to pure JS...
$('html, body').animate({scrollTop:0}, 400);

对于那些在进入图书馆之前应该已经学会了JS 100％的人来说，这是一个完美的案例。 ：（

I'm a perfect case for someone who should have learned JS 100% before jumping into a library. :(

推荐答案

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);
}

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</p>
<button id=scrollme type="button">To the top</button>

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