在jQuery中,您可以执行
之类的操作$('html, body').stop().animate({
'scrollTop': $target.offset().top
}, 1000);
我对如何在Javascript中处理此问题感兴趣?
谢谢!
答案 0 :(得分:2)
此问题通常通过使用setInterval
/ setTimeout
的函数回答,并以微小的增量滚动元素,请参阅:Cross browser JavaScript (not jQuery...) scroll to top animation
我想提出另一种更现代的方法,使用动态添加的CSS过渡,这应该更顺畅,更少耗费CPU。它使用CSS为body
设置动画,JavaScript仅计算并设置元素的translateY()
转换。 CSS动画完成后,将删除变换并设置滚动位置。
演示:http://jsfiddle.net/00uw1Lq9/4/(跨浏览器修复后的更新链接)。
仅适用于具有无前缀转换和转换的浏览器(在IE11,当前Chrome和Firefox中测试),对于旧版本,您可能需要添加前缀检测。它也可能在某些方面被打破,把它当作一个起点而不是一个解决方案。
// this function self-initializes and attaches an event listener to the root element
var smoothScroll = (function(root){
//keep track of the target element between scrolling function and transitionend callback
var targetElement;
// called when the CSS transition finishes
root.addEventListener('transitionend', function(e){
// remove transition and transform
root.style['transition'] = '';
root.style['transform'] = '';
// do the actual scrolling
targetElement.scrollIntoView();
});
// this function fill be available as the smoothScroll function
return function(element, time){
// get the top position of target element
var offset = element.offsetTop - root.scrollTop;
// if the element is very low it can't get scrolled up to the top of the window
offset = Math.min( offset, root.offsetHeight - document.documentElement.clientHeight );
// save reference to the target element for callback
targetElement = element;
// set transfor/transition CSS properties
root.style['transition'] = 'transform';
root.style['transition-duration'] = time;
// this fakes the scrolling animation by animating transform on the element
root.style['transform'] = 'translateY(' + offset * -1 +'px)';
}
}(document.body));
用法:smothScroll( DOMNodeReference, time )
,其中time
是对CSS transition-duration
属性有效的字符串(例如'300ms'
或'2.5s'
)。