我有一个滚动的div,我想有一个事件,当我点击它,它将迫使这个div滚动查看里面的一个元素。 我这样写它的JavasSript:

document.getElementById(chr).scrollIntoView(true);

但这在滚动div本身的同时滚动整个页面。 如何解决这个问题?

我想这样说: MyContainerDiv.getElementById(杆).scrollIntoView(真正的);


当前回答

这是一个简单的纯JavaScript解决方案,适用于目标数字(值为scrollTop),目标DOM元素,或一些特殊的字符串情况:

/**
 * 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;
    }
};

下面是一些用法的例子:

// Scroll to the top
var scrollableDiv = document.getElementById('scrollable_div');
scrollToTarget('top', scrollableDiv);

or

// Scroll to 200px from the top
var scrollableDiv = document.getElementById('scrollable_div');
scrollToTarget(200, scrollableDiv);

or

// Scroll to targetElement
var scrollableDiv = document.getElementById('scrollable_div');
var targetElement= document.getElementById('target_element');
scrollToTarget(targetElement, scrollableDiv);

其他回答

用户动画滚动

下面是一个如何在没有JQuery的情况下以编程方式横向滚动<div>的示例。要垂直滚动,可以将JavaScript对scrollLeft的写入替换为scrollTop。

JSFiddle

https://jsfiddle.net/fNPvf/38536/

HTML

<!-- Left Button. -->
<div style="float:left;">
    <!-- (1) Whilst it's pressed, increment the scroll. When we release, clear the timer to stop recursive scroll calls. -->
    <input type="button" value="«" style="height: 100px;" onmousedown="scroll('scroller',3, 10);" onmouseup="clearTimeout(TIMER_SCROLL);"/>
</div>
<!-- Contents to scroll. -->
<div id="scroller" style="float: left; width: 100px; height: 100px; overflow: hidden;">
    <!-- <3 -->
    <img src="https://cdn.sstatic.net/Sites/stackoverflow/company/img/logos/so/so-logo.png?v=9c558ec15d8a" alt="image large" style="height: 100px" />
</div>
<!-- Right Button. -->
<div style="float:left;">
    <!-- As (1). (Use a negative value of 'd' to decrease the scroll.) -->
    <input type="button" value="»" style="height: 100px;" onmousedown="scroll('scroller',-3, 10);" onmouseup="clearTimeout(TIMER_SCROLL);"/>
</div>

JavaScript

// Declare the Shared Timer.
var TIMER_SCROLL;
/** 
Scroll function. 
@param id  Unique id of element to scroll.
@param d   Amount of pixels to scroll per sleep.
@param del Size of the sleep (ms).*/
function scroll(id, d, del){
    // Scroll the element.
    document.getElementById(id).scrollLeft += d;
    // Perform a delay before recursing this function again.
    TIMER_SCROLL = setTimeout("scroll('"+id+"',"+d+", "+del+");", del);
 }

这要归功于Dux。


自动动画滚动

此外,这里还有用于将<div>完全向左和向右滚动的函数。这里我们唯一改变的是,在再次递归调用滚动之前,检查是否已经使用了滚动的完整扩展。

JSFiddle

https://jsfiddle.net/0nLc2fhh/1/

HTML

<!-- Left Button. -->
<div style="float:left;">
    <!-- (1) Whilst it's pressed, increment the scroll. When we release, clear the timer to stop recursive scroll calls. -->
    <input type="button" value="«" style="height: 100px;" onclick="scrollFullyLeft('scroller',3, 10);"/>
</div>
<!-- Contents to scroll. -->
<div id="scroller" style="float: left; width: 100px; height: 100px; overflow: hidden;">
  <!-- <3 -->
  <img src="https://cdn.sstatic.net/Sites/stackoverflow/company/img/logos/so/so-logo.png?v=9c558ec15d8a" alt="image large" style="height: 100px" />
</div>
<!-- Right Button. -->
<div style="float:left;">
    <!-- As (1). (Use a negative value of 'd' to decrease the scroll.) -->
    <input type="button" value="»" style="height: 100px;" onclick="scrollFullyRight('scroller',3, 10);"/>
</div>

JavaScript

// Declare the Shared Timer.
var TIMER_SCROLL;
/** 
Scroll fully left function; completely scrolls  a <div> to the left, as far as it will go.
@param id  Unique id of element to scroll.
@param d   Amount of pixels to scroll per sleep.
@param del Size of the sleep (ms).*/
function scrollFullyLeft(id, d, del){
    // Fetch the element.
    var el = document.getElementById(id);
    // Scroll the element.
    el.scrollLeft += d;
    // Have we not finished scrolling yet?
    if(el.scrollLeft < (el.scrollWidth - el.clientWidth)) {
        TIMER_SCROLL = setTimeout("scrollFullyLeft('"+id+"',"+d+", "+del+");", del);
    }
}

/** 
Scroll fully right function; completely scrolls  a <div> to the right, as far as it will go.
@param id  Unique id of element to scroll.
@param d   Amount of pixels to scroll per sleep.
@param del Size of the sleep (ms).*/
function scrollFullyRight(id, d, del){
    // Fetch the element.
    var el = document.getElementById(id);
    // Scroll the element.
    el.scrollLeft -= d;
    // Have we not finished scrolling yet?
    if(el.scrollLeft > 0) {
        TIMER_SCROLL = setTimeout("scrollFullyRight('"+id+"',"+d+", "+del+");", del);
    }
}

这就是我最终得到的

/** Set parent scroll to show element
 * @param element {object} The HTML object to show
 * @param parent {object} The HTML object where the element is shown  */
var scrollToView = function(element, parent) {
    //Algorithm: Accumulate the height of the previous elements and add half the height of the parent
    var offsetAccumulator = 0;
    parent = $(parent);
    parent.children().each(function() {
        if(this == element) {
            return false; //brake each loop
        }
        offsetAccumulator += $(this).innerHeight();
    });
    parent.scrollTop(offsetAccumulator - parent.innerHeight()/2);
}

我们可以在不使用JQuery和其他库的情况下解决这个问题。

为此,我编写了以下代码:

你有相似的结构,>

<div class="parent">
  <div class="child-one">

  </div>
  <div class="child-two">

  </div>
</div>

JS:

scrollToElement() {
  var parentElement = document.querySelector('.parent');
  var childElement = document.querySelector('.child-two');

  parentElement.scrollTop = childElement.offsetTop - parentElement.offsetTop;
}

我们可以很容易地重写这个方法,以参数的形式传递父和子

我需要滚动页面上的动态加载元素,所以我的解决方案有点复杂。

这将适用于静态元素,这些静态元素不是惰性加载数据,也不是动态加载数据。

const smoothScrollElement = async (selector: string, scrollBy = 12, prevCurrPos = 0) => {
    const wait = (timeout: number) => new Promise(resolve => setTimeout(resolve, timeout));
    const el = document.querySelector(selector) as HTMLElement;
    let positionToScrollTo = el.scrollHeight;
    let currentPosition = Math.floor(el.scrollTop) || 0;
    let pageYOffset = (el.clientHeight + currentPosition);
    if (positionToScrollTo == pageYOffset) {
        await wait(1000);
    }
    if ((prevCurrPos > 0 && currentPosition <= prevCurrPos) !== true) {
        setTimeout(async () => {
            el.scrollBy(0, scrollBy);
            await smoothScrollElement(selector, scrollBy, currentPosition);
        }, scrollBy);
    }
};

代码应该是:

var divElem = document.getElementById('scrolling_div');
var chElem = document.getElementById('element_within_div');
var topPos = divElem.offsetTop;
divElem.scrollTop = topPos - chElem.offsetTop;

您希望滚动子顶部位置和div顶部位置之间的差值。

使用以下方法访问子元素:

var divElem = document.getElementById('scrolling_div'); 
var numChildren = divElem.childNodes.length;

等等....