[英]Scrolling to a element inside a scrollable DIV with pure Javascript
我有一个overflow: scroll
的 div overflow: scroll
并且我在 DIV 中有一些隐藏的元素。 单击页面上的按钮时,我想让 DIV 滚动到 DIV 内的特定元素。
我如何实现这一目标?
您需要读取需要滚动到的 div 的offsetTop
属性,然后将该偏移设置为容器div
的scrollTop
属性。 将此函数绑定到您想要的事件:
function scrollToElementD(){ var topPos = document.getElementById('inner-element').offsetTop; document.getElementById('container').scrollTop = topPos-10; }
div { height: 200px; width: 100px; border: 1px solid black; overflow: auto; } p { height: 80px; background: blue; } #inner-element { background: red; }
<div id="container"><p>A</p><p>B</p><p>C</p><p id="inner-element">D</p><p>E</p><p>F</p></div> <button onclick="scrollToElementD()">SCROLL TO D</button>
function scrollToElementD(){
var topPos = document.getElementById('inner-element').offsetTop;
document.getElementById('container').scrollTop = topPos-10;
}
小提琴: http : //jsfiddle.net/p3kar5bb/322/ (礼貌@rofrischmann)
只是通过在 div 中包含的列表中设置平滑自动滚动来改进它
https://codepen.io/rebosante/pen/eENYBv
var topPos = elem.offsetTop
document.getElementById('mybutton').onclick = function () {
console.log('click')
scrollTo(document.getElementById('container'), topPos-10, 600);
}
function scrollTo(element, to, duration) {
var start = element.scrollTop,
change = to - start,
currentTime = 0,
increment = 20;
var animateScroll = function(){
currentTime += increment;
var val = Math.easeInOutQuad(currentTime, start, change, duration);
element.scrollTop = val;
if(currentTime < duration) {
setTimeout(animateScroll, increment);
}
};
animateScroll();
}
//t = current time
//b = start value
//c = change in value
//d = duration
Math.easeInOutQuad = function (t, b, c, d) {
t /= d/2;
if (t < 1) return c/2*t*t + b;
t--;
return -c/2 * (t*(t-2) - 1) + b;
};
我想它可能会帮助某人:)
这是一个简单的纯 JavaScript 解决方案,适用于目标 Number( scrollTop
值)、目标 DOM 元素或一些特殊的 String 情况:
/**
* target - target to scroll to (DOM element, scrollTop Number, 'top', or 'bottom'
* containerEl - DOM element for the container with scrollbars
*/
var scrollToTarget = function(target, containerEl) {
// Moved up here for readability:
var isElement = target && target.nodeType === 1,
isNumber = Object.prototype.toString.call(target) === '[object Number]';
if (isElement) {
containerEl.scrollTop = target.offsetTop;
} else if (isNumber) {
containerEl.scrollTop = target;
} else if (target === 'bottom') {
containerEl.scrollTop = containerEl.scrollHeight - containerEl.offsetHeight;
} else if (target === 'top') {
containerEl.scrollTop = 0;
}
};
以下是一些用法示例:
// Scroll to the top
var scrollableDiv = document.getElementById('scrollable_div');
scrollToTarget('top', scrollableDiv);
或者
// Scroll to 200px from the top
var scrollableDiv = document.getElementById('scrollable_div');
scrollToTarget(200, scrollableDiv);
或者
// Scroll to targetElement
var scrollableDiv = document.getElementById('scrollable_div');
var targetElement= document.getElementById('target_element');
scrollToTarget(targetElement, scrollableDiv);
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