Я ищу простую кросс-браузерную анимацию "scroll to top", которую я могу применить к ссылке. Я не хочу требовать библиотеку JS, такую как jQuery/Moo и т.д.
// jQuery Equivilant to convert to pure JS...
$('html, body').animate({scrollTop:0}, 400);
Я идеальный случай для тех, кто должен был научиться JS 100%, прежде чем прыгать в библиотеку.: (
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);
}
Демо:
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>похоже, что есть много решений. во всяком случае, здесь другой, использует смягчающие уравнения..
// first add raf shim
// http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function( callback ){
window.setTimeout(callback, 1000 / 60);
};
})();
// main function
function scrollToY(scrollTargetY, speed, easing) {
// scrollTargetY: the target scrollY property of the window
// speed: time in pixels per second
// easing: easing equation to use
var scrollY = window.scrollY || document.documentElement.scrollTop,
scrollTargetY = scrollTargetY || 0,
speed = speed || 2000,
easing = easing || 'easeOutSine',
currentTime = 0;
// min time .1, max time .8 seconds
var time = Math.max(.1, Math.min(Math.abs(scrollY - scrollTargetY) / speed, .8));
// easing equations from https://github.com/danro/easing-js/blob/master/easing.js
var easingEquations = {
easeOutSine: function (pos) {
return Math.sin(pos * (Math.PI / 2));
},
easeInOutSine: function (pos) {
return (-0.5 * (Math.cos(Math.PI * pos) - 1));
},
easeInOutQuint: function (pos) {
if ((pos /= 0.5) < 1) {
return 0.5 * Math.pow(pos, 5);
}
return 0.5 * (Math.pow((pos - 2), 5) + 2);
}
};
// add animation loop
function tick() {
currentTime += 1 / 60;
var p = currentTime / time;
var t = easingEquations[easing](p);
if (p < 1) {
requestAnimFrame(tick);
window.scrollTo(0, scrollY + ((scrollTargetY - scrollY) * t));
} else {
console.log('scroll done');
window.scrollTo(0, scrollTargetY);
}
}
// call it once to get started
tick();
}
// scroll it!
scrollToY(0, 1500, 'easeInOutQuint');
Я модифицировал TimWolla, чтобы использовать квадратичное ослабление входа (немного более плавное:). Вот пример в действии: на jsFiddle. Функции Easing доступны здесь: Функции Роберта Пеннера Освобождение
document.getElementsByTagName('button')[0].onclick = function () {
scrollTo(document.body, 0, 1250);
}
function scrollTo(element, to, duration) {
var start = element.scrollTop,
change = to - start,
increment = 20;
var animateScroll = function(elapsedTime) {
elapsedTime += increment;
var position = easeInOut(elapsedTime, start, change, duration);
element.scrollTop = position;
if (elapsedTime < duration) {
setTimeout(function() {
animateScroll(elapsedTime);
}, increment);
}
};
animateScroll(0);
}
function easeInOut(currentTime, start, change, duration) {
currentTime /= duration / 2;
if (currentTime < 1) {
return change / 2 * currentTime * currentTime + start;
}
currentTime -= 1;
return -change / 2 * (currentTime * (currentTime - 2) - 1) + start;
}
window.scroll({top: 0, left: 0, behavior: 'smooth' });
Получил это из статьи о Smooth Scrolling.
При необходимости есть несколько polyfills.
Без кода JQuery, надеюсь, это поможет вам.
function TopscrollTo() {
if(window.scrollY!=0)
{
setTimeout(function() {
window.scrollTo(0,window.scrollY-30);
TopscrollTo();
}, 100);
}
}
вызовите эту функцию TopscrollTo() при событии нажатия кнопки или любом другом элементе/событии, которое вы хотите.
Я изменил код @TimWolla, чтобы добавить дополнительные параметры и некоторые функции перемещения. Кроме того, добавлена поддержка crossbrowser с document.body.scrollTop и document.documentElement.scrollTop
// scroll to top
scrollTo(0, 1000);
// Element to move, time in ms to animate
function scrollTo(element, duration) {
var e = document.documentElement;
if(e.scrollTop===0){
var t = e.scrollTop;
++e.scrollTop;
e = t+1===e.scrollTop--?e:document.body;
}
scrollToC(e, e.scrollTop, element, duration);
}
// Element to move, element or px from, element or px to, time in ms to animate
function scrollToC(element, from, to, duration) {
if (duration <= 0) return;
if(typeof from === "object")from=from.offsetTop;
if(typeof to === "object")to=to.offsetTop;
scrollToX(element, from, to, 0, 1/duration, 20, easeOutCuaic);
}
function scrollToX(element, xFrom, xTo, t01, speed, step, motion) {
if (t01 < 0 || t01 > 1 || speed<= 0) {
element.scrollTop = xTo;
return;
}
element.scrollTop = xFrom - (xFrom - xTo) * motion(t01);
t01 += speed * step;
setTimeout(function() {
scrollToX(element, xFrom, xTo, t01, speed, step, motion);
}, step);
}
function easeOutCuaic(t){
t--;
return t*t*t+1;
}
http://jsfiddle.net/forestrf/tPQSv/
Минимальная версия: http://jsfiddle.net/forestrf/tPQSv/139/
// c = element to scroll to or top position in pixels
// e = duration of the scroll in ms, time scrolling
// d = (optative) ease function. Default easeOutCuaic
function scrollTo(c,e,d){d||(d=easeOutCuaic);var a=document.documentElement;if(0===a.scrollTop){var b=a.scrollTop;++a.scrollTop;a=b+1===a.scrollTop--?a:document.body}b=a.scrollTop;0>=e||("object"===typeof b&&(b=b.offsetTop),"object"===typeof c&&(c=c.offsetTop),function(a,b,c,f,d,e,h){function g(){0>f||1<f||0>=d?a.scrollTop=c:(a.scrollTop=b-(b-c)*h(f),f+=d*e,setTimeout(g,e))}g()}(a,b,c,0,1/e,20,d))};
function easeOutCuaic(t){
t--;
return t*t*t+1;
}
Адаптировано из this answer:
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);
}
Это должно позволить вам плавно прокручивать (косинусную функцию) из любого места в указанное "y".
На самом деле существует чистый способ JavaScript для этого без использования setTimeout requestAnimationFrame или jQuery.
Короче говоря, найдите элемент в scrollView, к которому вы хотите перейти, и используйте scrollIntoView
el.scrollIntoView({behavior:"smooth"});
Вот такой вот плункр.
Легко.
var scrollIt = function(time) {
// time = scroll time in ms
var start = new Date().getTime(),
scroll = document.documentElement.scrollTop + document.body.scrollTop,
timer = setInterval(function() {
var now = Math.min(time,(new Date().getTime())-start)/time;
document.documentElement.scrollTop
= document.body.scrollTop = (1-time)/start*scroll;
if( now == 1) clearTimeout(timer);
},25);
}
PURE JAVASCRIPT SCROLLER CLASS
Это старый вопрос, но я подумал, что могу ответить с помощью некоторых причудливых вещей и еще нескольких вариантов игры, если вы хотите немного контролировать анимацию.
Кросс-браузер Скопировать/вставить готовое решение (вам нужны только CSS и JS) 3 режима анимации: [ "normal" | "linear" | false] Настройте свою анимацию с помощью доступных настроек - сделайте ее быстрой или плавной. Дважды щелкните, чтобы пропустить анимацию. Каждый следующий один клик добавляет начальную скорость Остановить анимацию прокрутки с помощью прокрутки полосы прокрутки Остановить анимацию прокрутки с помощью колеса мыши вниз Анимированная кнопка для прокрутки прокрутки
Здесь чистый класс JS, который позаботится о прокрутке для вас:
СМОТРЕТЬ ДЕМО НА CODEPEN ИЛИ ПЕРЕЙТИ К НОМЕРА И ПРОВЕРИТЬ СИНПЕТ
// ------------------- USE EXAMPLE ---------------------
// *Set options
var options = {
'showButtonAfter': 200, // show button after scroling down this amount of px
'animate': "linear", // [false|normal|linear] - for false no aditional settings are needed
'normal': { // applys only if [animate: normal] - set scroll loop distanceLeft/steps|ms
'steps': 20, // the more steps per loop the slower animation gets
'ms': 10 // the less ms the quicker your animation gets
},
'linear': { // applys only if [animate: linear] - set scroll px|ms
'px': 30, // the more px the quicker your animation gets
'ms': 10 // the less ms the quicker your animation gets
},
};
// *Create new Scroller and run it.
var scroll = new Scroller(options);
scroll.init();
ПОЛНЫЙ КЛАСС SCRIPT + ПРИМЕР ПОЛЬЗОВАТЕЛЯ:
// PURE JAVASCRIPT (OOP)
function Scroller(options) {
this.options = options;
this.button = null;
this.stop = false;
}
Scroller.prototype.constructor = Scroller;
Scroller.prototype.createButton = function() {
this.button = document.createElement('button');
this.button.classList.add('scroll-button');
this.button.classList.add('scroll-button--hidden');
this.button.textContent = "^";
document.body.appendChild(this.button);
}
Scroller.prototype.init = function() {
this.createButton();
this.checkPosition();
this.click();
this.stopListener();
}
Scroller.prototype.scroll = function() {
if (this.options.animate == false || this.options.animate == "false") {
this.scrollNoAnimate();
return;
}
if (this.options.animate == "normal") {
this.scrollAnimate();
return;
}
if (this.options.animate == "linear") {
this.scrollAnimateLinear();
return;
}
}
Scroller.prototype.scrollNoAnimate = function() {
document.body.scrollTop = 0;
document.documentElement.scrollTop = 0;
}
Scroller.prototype.scrollAnimate = function() {
if (this.scrollTop() > 0 && this.stop == false) {
setTimeout(function() {
this.scrollAnimate();
window.scrollBy(0, (-Math.abs(this.scrollTop()) / this.options.normal['steps']));
}.bind(this), (this.options.normal['ms']));
}
}
Scroller.prototype.scrollAnimateLinear = function() {
if (this.scrollTop() > 0 && this.stop == false) {
setTimeout(function() {
this.scrollAnimateLinear();
window.scrollBy(0, -Math.abs(this.options.linear['px']));
}.bind(this), this.options.linear['ms']);
}
}
Scroller.prototype.click = function() {
this.button.addEventListener("click", function(e) {
e.stopPropagation();
this.scroll();
}.bind(this), false);
this.button.addEventListener("dblclick", function(e) {
e.stopPropagation();
this.scrollNoAnimate();
}.bind(this), false);
}
Scroller.prototype.hide = function() {
this.button.classList.add("scroll-button--hidden");
}
Scroller.prototype.show = function() {
this.button.classList.remove("scroll-button--hidden");
}
Scroller.prototype.checkPosition = function() {
window.addEventListener("scroll", function(e) {
if (this.scrollTop() > this.options.showButtonAfter) {
this.show();
} else {
this.hide();
}
}.bind(this), false);
}
Scroller.prototype.stopListener = function() {
// stop animation on slider drag
var position = this.scrollTop();
window.addEventListener("scroll", function(e) {
if (this.scrollTop() > position) {
this.stopTimeout(200);
} else {
//...
}
position = this.scrollTop();
}.bind(this, position), false);
// stop animation on wheel scroll down
window.addEventListener("wheel", function(e) {
if (e.deltaY > 0) this.stopTimeout(200);
}.bind(this), false);
}
Scroller.prototype.stopTimeout = function(ms) {
this.stop = true;
// console.log(this.stop); //
setTimeout(function() {
this.stop = false;
console.log(this.stop); //
}.bind(this), ms);
}
Scroller.prototype.scrollTop = function() {
var curentScrollTop = document.documentElement.scrollTop || document.body.scrollTop;
return curentScrollTop;
}
// ------------------- USE EXAMPLE ---------------------
// *Set options
var options = {
'showButtonAfter': 200, // show button after scroling down this amount of px
'animate': "normal", // [false|normal|linear] - for false no aditional settings are needed
'normal': { // applys only if [animate: normal] - set scroll loop distanceLeft/steps|ms
'steps': 20, // the more steps per loop the slower animation gets
'ms': 10 // the less ms the quicker your animation gets
},
'linear': { // applys only if [animate: linear] - set scroll px|ms
'px': 30, // the more px the quicker your animation gets
'ms': 10 // the less ms the quicker your animation gets
},
};
// *Create new Scroller and run it.
var scroll = new Scroller(options);
scroll.init();/* CSS */
@import url(https://fonts.googleapis.com/css?family=Open+Sans);
body {
font-family: 'Open Sans', sans-serif;
font-size: 1.2rem;
line-height: 2rem;
height: 100%;
position: relative;
padding: 0 25%;
}
.scroll-button {
font-size: 1.2rem;
line-height: 2rem;
padding: 10px;
width: 50px;
height: 50px;
background: black;
color: white;
border-radius: 50%;
position: fixed;
right: 20px;
bottom: 20px;
visibility: visible;
filter: alpha(opacity=50);
filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=50);
opacity: 0.5;
cursor: pointer;
transition: all 1.2s;
-webkit-transition: all 1.2s;
-moz-transition: all 1.2s;
-ms-transition: all 1.2s;
-o-transition: all 1.2s;
}
.scroll-button:hover {
filter: alpha(opacity=100);
filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=100);
opacity: 1;
}
.scroll-button--hidden {
filter: alpha(opacity=0);
filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=0);
opacity: 0;
visibility: hidden;
}<!-- HTML -->
<h1>Scroll down by 200px for button to appear</h1>
<ul>
<li>Cross-browser</li>
<li>Copy/Paste solution</li>
<li>3 animate modes: <b>["normal"|"linear"|false]</b></li>
<li>Customize your aniamtion with aveilable settings - make it snapy or fluent</li>
<li>Double click to skip animation</li>
<li>Every next single click adds initial speed</li>
<li>Stop scroll animation by draging down the scroll bar</li>
<li>Stop scroll animation by mouse wheel down</li>
<li>Animated button fade-in-out on scroll</li>
</ul>
<br />
<br />
<pre>
// ------------------- USE EXAMPLE ---------------------
// *Set options
var options = {
'showButtonAfter': 200, // show button after scroling down this amount of px
'animate': "normal", // [false|normal|linear] - for false no aditional settings are needed
'normal': { // applys only if [animate: normal] - set scroll loop distanceLeft/steps|ms
'steps': 20, // the more steps the slower animation gets
'ms': 20 // the less ms the quicker your animation gets
},
'linear': { // applys only if [animate: linear] - set scroll px|ms
'px': 55, // the more px the quicker your animation gets
'ms': 10 // the less ms the quicker your animation gets
},
};
// *Create new Scroller and run it.
var scroll = new Scroller(options);
scroll.init();
</pre>
<br />
<br />
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<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Obcaecati quibusdam, tempora cupiditate quaerat tempore ullam delectus voluptates optio eum placeat provident consequatur iure reprehenderit vero quae sapiente architecto earum nemo.</span><span>Quis molestias sint fuga doloribus, necessitatibus nulla. Esse ipsa, itaque asperiores. Tempora a sequi nobis cumque incidunt aspernatur, pariatur rem voluptatibus. Atque veniam magnam, ea laudantium ipsum reprehenderit sapiente repellendus.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Minima, pariatur at explicabo aliquid repudiandae vero eum quasi totam voluptates iusto unde ad repellendus ipsam et voluptatem hic adipisci! Vero, nobis!</span><span>Consequatur eligendi quo quas omnis architecto dolorum aperiam doloremque labore, explicabo enim incidunt vitae saepe, quod soluta illo odit provident amet beatae quasi animi. Similique nostrum molestiae animi corrupti qui?</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Molestias quis, tempora laborum incidunt qui fuga adipisci doloremque iusto commodi vitae est, nemo iure placeat ut sit optio, consequuntur voluptas impedit.</span><span>Eos officiis, hic esse unde eaque, aut tenetur voluptate quam sint vel exercitationem totam dolor odio soluta illo praesentium non corrupti! Consequuntur velit, mollitia excepturi. Minus, veniam accusantium! Aliquam, ea!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reprehenderit quis reiciendis veritatis expedita velit vitae amet magni sunt rerum in blanditiis aut tempore quia fugiat, voluptates officia quaerat quam id.</span><span>Sapiente tempore repudiandae, quae doloremque ullam odio quia ea! Impedit atque, ipsa consequatur quis obcaecati voluptas necessitatibus, cupiditate sunt amet ab modi illum inventore, a dolor enim similique architecto est!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Itaque non aliquam, sit illo quas deserunt esse nobis reprehenderit quidem fuga beatae eligendi reiciendis omnis qui repellat velit earum blanditiis possimus.</span><span>Provident aspernatur ducimus, illum beatae debitis vitae non dolorum rem officia nostrum natus accusantium perspiciatis ad soluta maiores praesentium eveniet qui hic quis at quaerat ea perferendis. Ut, aut, natus.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ratione corrupti quibusdam, sed hic veniam. Perspiciatis ex, quod architecto natus autem totam at commodi excepturi maxime pariatur corporis, veritatis vero, praesentium.</span><span>Nesciunt suscipit, nobis eos perferendis ex quaerat inventore nihil qui magnam saepe rerum velit reiciendis ipsam deleniti ducimus eligendi odio eius minima vero, nisi voluptates amet eaque, iste, labore laudantium.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Illo, voluptas accusantium ad omnis velit distinctio! Adipisci magnam nihil nostrum molestiae rem dolores, ut ad nemo, dolor quos itaque maiores quaerat!</span><span>Quia ad suscipit reprehenderit vitae inventore eius non culpa maiores omnis sit obcaecati vel placeat quibusdam, ipsa exercitationem nam odit, magni nobis. Quam quas, accusamus expedita molestiae asperiores eaque ex?</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Rerum explicabo doloribus nihil iusto quasi vel expedita dignissimos amet mollitia, temporibus aut atque architecto assumenda dolorum nam velit deserunt totam numquam.</span><span>Ab perferendis labore, quae. Quidem architecto quo officia deserunt ea doloribus libero molestias id nisi perferendis eum porro, quibusdam! Odit aliquid placeat rem aut officia minus sit esse eos obcaecati!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Eligendi nostrum repellendus placeat, unde aperiam. Fuga, voluptas, minima. Debitis nemo ducimus itaque laboriosam error quaerat reprehenderit quo animi incidunt. Nulla, quis!</span><span>Explicabo assumenda dicta ratione? Tempora commodi asperiores, explicabo doloremque eius quia impedit possimus architecto sit nemo odio eum fuga minima dolor iste mollitia sequi dolorem perspiciatis unde quisquam laborum soluta.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Veniam officia corporis, reiciendis laudantium, voluptate voluptates necessitatibus assumenda, delectus quisquam velit deserunt! Reprehenderit, vel quaerat accusantium nesciunt libero animi. Sequi, eveniet?</span><span>Animi natus pariatur porro, alias, veniam aut est tempora adipisci molestias harum modi cumque assumenda enim! Expedita eveniet autem illum rerum nostrum ipsum alias neque aut, dolorum impedit pariatur non?</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quis aliquid rerum, odio veniam ipsam ad officia quos repellat ex aperiam voluptatum optio est animi possimus minus. Sapiente voluptates amet dolorem.</span><span>Illo necessitatibus similique asperiores inventore ut cumque nihil assumenda debitis explicabo rerum, dolorum molestiae culpa accusantium. Nisi doloremque optio provident blanditiis, eum ipsam asperiores, consequatur aliquam vel sit mollitia sunt.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Enim, totam harum perferendis. Minus ea perferendis laboriosam, iste, qui corrupti, quas veritatis omnis officiis animi fuga perspiciatis impedit! Error, harum, voluptas.</span><span>Omnis laborum, cum mollitia facilis ipsa unde distinctio maxime nesciunt illum perspiciatis ut officiis, eligendi numquam dolorem quod modi ipsam est rerum perferendis repellendus totam. Maxime excepturi culpa alias labore.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Impedit deleniti, odit sit consequatur dolorum omnis repellendus, alias vel ullam numquam. Nostrum obcaecati hic, possimus delectus nam atque aliquid explicabo cum.</span><span>Explicabo tenetur minima consequatur, aliquam, laudantium non consequuntur facilis sint, suscipit debitis ex atque mollitia magni quod repellat ratione dolorum excepturi molestiae cumque iusto eos unde? Voluptatum dolores, porro provident!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. At laboriosam fuga aperiam eveniet, obcaecati esse, nulla porro iure molestiae praesentium sint fugiat ea voluptate suscipit voluptates mollitia, voluptatibus. Autem, non.</span><span>Numquam velit culpa tempora ratione ipsum minus modi in? Nisi reiciendis, voluptate voluptatem maxime repellat quae odio, repellendus aliquid laborum dolorem. Labore, fuga ea minima explicabo quae voluptatum necessitatibus, similique.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quasi, rerum dolorum nemo error fugiat ut, modi, architecto libero maxime laborum repellendus doloribus neque aperiam adipisci quaerat obcaecati deserunt consequuntur amet!</span><span>Sint, assumenda nisi obcaecati doloremque iste. Perspiciatis accusantium, distinctio impedit cum esse recusandae sunt. Officiis culpa dolore eius, doloribus natus, dolorum excepturi vitae fugiat ullam provident harum! Suscipit, assumenda, harum.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Odit, nihil tenetur tempore eligendi qui nesciunt consequatur delectus accusantium consectetur ipsa, nulla doloribus dolores rerum corporis, laborum, laboriosam hic mollitia repellat.</span><span>Ab deleniti vitae blanditiis quod tenetur! Voluptatem temporibus ab eaque quis? Quis odio aliquid harum temporibus totam, ipsa eius iusto fugiat enim in, quibusdam molestiae aliquam consequatur nulla, consequuntur sint.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Illum odit praesentium quos, earum nesciunt laudantium illo tempora eligendi, porro doloremque mollitia neque aperiam inventore nam maxime dolor labore aspernatur molestias.</span><span>Voluptatibus provident hic cupiditate placeat, ut reprehenderit nisi eum, dolores ad sed quis. Doloribus molestiae, quae rem odit expedita soluta, facilis animi corporis velit ut in, recusandae harum laboriosam veritatis.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Incidunt repudiandae molestias magnam delectus veritatis labore, corporis dicta officia quos, ad corrupti odit! Ad hic officia maxime eveniet consectetur similique adipisci!</span><span>Quia at, nesciunt aliquid delectus ex alias voluptas maxime hic esse. Incidunt, laborum quos mollitia dolores et! Voluptas commodi asperiores, fugit quidem quis corporis, a eaque, animi, autem deserunt repellendus.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sequi quas, voluptas hic minima inventore optio, id quidem placeat necessitatibus omnis voluptatibus vitae mollitia tempora consequuntur consequatur, illo facilis accusamus illum.</span><span>Voluptates consequuntur ipsam odit. Eius quis ipsam vitae, nihil molestias perferendis corporis recusandae consequatur vero iure blanditiis quas adipisci quos voluptatem rem illo voluptate. Eveniet officiis iure sit laborum veniam.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Suscipit a quis cumque nostrum quisquam molestiae pariatur, asperiores natus necessitatibus adipisci illum cupiditate nam vero, tempora excepturi laborum, earum. Voluptates, nobis.</span><span>Pariatur suscipit, hic blanditiis libero, iusto, quam cupiditate nam error id asperiores repellat ab consequatur vitae ipsa voluptatem totam magni reiciendis expedita maxime dolor! Minus explicabo quas, laborum ab omnis!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Labore qui ad assumenda placeat optio illo molestias corporis dolorum cum. Doloribus eius autem obcaecati minima, asperiores iure dignissimos ducimus suscipit dolorem.</span><span>Blanditiis earum accusamus eaque temporibus necessitatibus voluptatum dolorem enim debitis inventore assumenda quae error perspiciatis aut, nulla delectus quam ipsa sapiente ea aliquam laboriosam repudiandae. Nesciunt praesentium, beatae eos quasi!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cupiditate dicta voluptate impedit? Ad voluptatum dicta earum perferendis asperiores. Dolore distinctio modi expedita consequatur provident perspiciatis neque totam rerum placeat quas.</span><span>Eveniet optio est possimus iste accusantium ipsum illum. Maiores saepe repudiandae facere, delectus iure dolorem vitae nihil pariatur minima, reprehenderit eligendi dolore impedit, nisi doloribus quidem similique. Optio, delectus, minus.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Iste ex molestiae architecto enim nihil tempore, atque consequuntur doloribus recusandae sed consequatur veniam quos, in consectetur perspiciatis magni nostrum ab voluptates.</span><span>Nisi quos mollitia quis in maiores asperiores labore deserunt! Voluptate voluptas adipisci qui hic officia molestias, laborum necessitatibus sint nam vel minus incidunt perspiciatis recusandae sunt, rerum suscipit doloremque possimus!</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. At nihil perferendis quae quidem facilis aliquid pariatur possimus hic asperiores, recusandae exercitationem adipisci atque laborum, delectus, odit ab reprehenderit distinctio dolor.</span><span>Non excepturi quos aspernatur repudiandae laboriosam, unde molestias, totam, sapiente harum accusamus delectus laborum ipsam velit amet nisi! Consectetur aliquam provident voluptatibus saepe repudiandae eveniet laborum beatae, animi, voluptate dolores.</span></p>
<p><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque magni, eum ipsa, veritatis facere voluptatem dolorum nobis neque minus debitis asperiores iste. Pariatur sequi quam, tempora. Dignissimos, esse similique tempora.</span><span>Ex delectus excepturi autem sunt, nemo repudiandae, recusandae nostrum accusantium nobis temporibus magnam eligendi similique veritatis deleniti, eaque blanditiis possimus at! Repellat alias laboriosam ipsum commodi dolorem, corporis dolore suscipit!</span></p>Только что сделал это javascript только ниже.
Простое использование:
EPPZScrollTo.scrollVerticalToElementById('wrapper', 0);
Объект Engine (вы можете играть с фильтром, значения fps):
/**
*
* Created by Borbás Geri on 12/17/13
* Copyright (c) 2013 eppz! development, LLC.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
var EPPZScrollTo =
{
/**
* Helpers.
*/
documentVerticalScrollPosition: function()
{
if (self.pageYOffset) return self.pageYOffset; // Firefox, Chrome, Opera, Safari.
if (document.documentElement && document.documentElement.scrollTop) return document.documentElement.scrollTop; // Internet Explorer 6 (standards mode).
if (document.body.scrollTop) return document.body.scrollTop; // Internet Explorer 6, 7 and 8.
return 0; // None of the above.
},
viewportHeight: function()
{ return (document.compatMode === "CSS1Compat") ? document.documentElement.clientHeight : document.body.clientHeight; },
documentHeight: function()
{ return (document.height !== undefined) ? document.height : document.body.offsetHeight; },
documentMaximumScrollPosition: function()
{ return this.documentHeight() - this.viewportHeight(); },
elementVerticalClientPositionById: function(id)
{
var element = document.getElementById(id);
var rectangle = element.getBoundingClientRect();
return rectangle.top;
},
/**
* Animation tick.
*/
scrollVerticalTickToPosition: function(currentPosition, targetPosition)
{
var filter = 0.2;
var fps = 60;
var difference = parseFloat(targetPosition) - parseFloat(currentPosition);
// Snap, then stop if arrived.
var arrived = (Math.abs(difference) <= 0.5);
if (arrived)
{
// Apply target.
scrollTo(0.0, targetPosition);
return;
}
// Filtered position.
currentPosition = (parseFloat(currentPosition) * (1.0 - filter)) + (parseFloat(targetPosition) * filter);
// Apply target.
scrollTo(0.0, Math.round(currentPosition));
// Schedule next tick.
setTimeout("EPPZScrollTo.scrollVerticalTickToPosition("+currentPosition+", "+targetPosition+")", (1000 / fps));
},
/**
* For public use.
*
* @param id The id of the element to scroll to.
* @param padding Top padding to apply above element.
*/
scrollVerticalToElementById: function(id, padding)
{
var element = document.getElementById(id);
if (element == null)
{
console.warn('Cannot find element with id \''+id+'\'.');
return;
}
var targetPosition = this.documentVerticalScrollPosition() + this.elementVerticalClientPositionById(id) - padding;
var currentPosition = this.documentVerticalScrollPosition();
// Clamp.
var maximumScrollPosition = this.documentMaximumScrollPosition();
if (targetPosition > maximumScrollPosition) targetPosition = maximumScrollPosition;
// Start animation.
this.scrollVerticalTickToPosition(currentPosition, targetPosition);
}
};
Основываясь на некоторых ответах здесь, но используя некоторую простую математику для плавного перехода с использованием синусоидальной кривой:
scrollTo(element, from, to, duration, currentTime) {
if (from <= 0) { from = 0;}
if (to <= 0) { to = 0;}
if (currentTime>=duration) return;
let delta = to-from;
let progress = currentTime / duration * Math.PI / 2;
let position = delta * (Math.sin(progress));
setTimeout(() => {
element.scrollTop = from + position;
this.scrollTo(element, from, to, duration, currentTime + 10);
}, 10);
}
Использование:
// Smoothly scroll from current position to new position in 1/2 second.
scrollTo(element, element.scrollTop, element.scrollTop + 400, 500, 0);
PS. обратите внимание на стиль ES6
Это кросс-браузерный подход, основанный на ответах выше
function scrollTo(to, duration) {
if (duration < 0) return;
var scrollTop = document.body.scrollTop + document.documentElement.scrollTop;
var difference = to - scrollTop;
var perTick = difference / duration * 10;
setTimeout(function() {
scrollTop = scrollTop + perTick;
document.body.scrollTop = scrollTop;
document.documentElement.scrollTop = scrollTop;
if (scrollTop === to) return;
scrollTo(to, duration - 10);
}, 10);
}
Еще один подход заключается в использовании window.scrollBy
function scroll(pxPerFrame, duration) {
if (!pxPerFrame || !duration) return;
const end = new Date().getTime() + duration;
step();
function step() {
window.scrollBy(0, pxPerFrame);
if (new Date().getTime() < end) {
window.setTimeout(step, 1000 / 60);
} else {
console.log('done scrolling');
}
}
}body {
width: 200px;
}<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
<p>
<button onclick="scroll(-5, 3000)">
scroll(-5, 3000)
</button>
</p>Я выбрал @akai версию ответа @timwolla и добавил функцию stopAnimation в свою очередь, поэтому перед запуском новой анимации старый можно остановить.
if ( this.stopAnimation )
this.stopAnimation()
this.stopAnimation = scrollTo( el, scrollDestination, 300 )
// definitions
function scrollTo(element, to, duration) {
var start = element.scrollTop,
change = to - start,
increment = 20,
timeOut;
var animateScroll = function(elapsedTime) {
elapsedTime += increment;
var position = easeInOut(elapsedTime, start, change, duration);
element.scrollTop = position;
if (elapsedTime < duration) {
timeOut = setTimeout(function() {
animateScroll(elapsedTime);
}, increment);
}
};
animateScroll(0);
return stopAnimation
function stopAnimation() {
clearTimeout( timeOut )
}
}
function easeInOut(currentTime, start, change, duration) {
currentTime /= duration / 2;
if (currentTime < 1) {
return change / 2 * currentTime * currentTime + start;
}
currentTime -= 1;
return -change / 2 * (currentTime * (currentTime - 2) - 1) + start;
}
Другой подход, основанный на вышеприведенном решении на основе кросс-браузера
function doScrollTo(to, duration) {
var element = document.documentElement;
var start = element.scrollTop,
change = to - start,
increment = 20,
i = 0;
var animateScroll = function(elapsedTime) {
elapsedTime += increment;
var position = easeInOut(elapsedTime, start, change, duration);
if (i === 1 && window.scrollY === start) {
element = document.body;
start = element.scrollTop;
}
element.scrollTop = position;
if (!i) i++;
if (elapsedTime < duration) {
setTimeout(function() {
animateScroll(elapsedTime);
}, increment);
}
};
animateScroll(0);
}
Фокус в том, чтобы контролировать фактическое изменение прокрутки, а если оно равно нулю, измените элемент прокрутки.
Никто не упомянул скролл-поведение
CSS
html {
scroll-behavior: smooth;
}
JS
window.scrollTo(0,0)
Используйте это решение
animate(document.documentElement, 'scrollTop', 0, 200);
Спасибо
Я вижу, что большинство/всех вышеперечисленных сообщений ищут кнопку с javascript. Это работает, если у вас есть только одна кнопка. Я бы рекомендовал определить элемент "onclick" внутри кнопки. Тогда "onclick" вызовет функцию, вызывающую ее прокрутку.
Если вы это сделаете, вы можете использовать более одной кнопки, если кнопка выглядит примерно так:
<button onclick="scrollTo(document.body, 0, 1250)">To the top</button>