如何滚动到div内的元素？

Question

我有一个滚动的div，当我点击它时我想要一个链接它会强制这个div滚动查看里面的元素。 我写了这样的JavasSript：

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

但滚动div本身时会滚动所有页面。 如何解决？

我想这样说

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

Answer 1

您需要获取要滚动到视图中的元素的顶部偏移量，相对于其父元素（滚动div容器）：

var myElement = document.getElementById('element_within_div');
var topPos = myElement.offsetTop;

变量topPos现在设置为滚动div的顶部与您希望可见的元素之间的距离（以像素为单位）。

现在我们告诉div使用scrollTop滚动到该位置：

document.getElementById('scrolling_div').scrollTop = topPos;

如果你正在使用原型JS框架，你会做同样的事情：

var posArray = $('element_within_div').positionedOffset();
$('scrolling_div').scrollTop = posArray[1];

同样，这将滚动div，以便您希望看到的元素正好位于顶部（或者如果不可能，则向前滚动尽可能远，以便它可见）。

Answer 2

您必须在要滚动到的DIV中找到元素的位置，并设置scrollTop属性。

divElem.scrollTop = 0;

<强> 更新 ：

向上或向下移动的示例代码

  function move_up() {
    document.getElementById('divElem').scrollTop += 10;
  }

  function move_down() {
    document.getElementById('divElem').scrollTop -= 10;
  }

Answer 3

方法1-平滑滚动到元素内部的元素

TV

var box = document.querySelector('.box'),
    targetElm = document.querySelector('.boxChild'); // <-- Scroll to here within ".box"

document.querySelector('button').addEventListener('click', function(){
   scrollToElm( box, targetElm , 600 );   
});


/////////////

function scrollToElm(container, elm, duration){
  var pos = getRelativePos(elm);
  scrollTo( container, pos.top , 2);  // duration in seconds
}

function getRelativePos(elm){
  var pPos = elm.parentNode.getBoundingClientRect(), // parent pos
      cPos = elm.getBoundingClientRect(), // target pos
      pos = {};

  pos.top    = cPos.top    - pPos.top + elm.parentNode.scrollTop,
  pos.right  = cPos.right  - pPos.right,
  pos.bottom = cPos.bottom - pPos.bottom,
  pos.left   = cPos.left   - pPos.left;

  return pos;
}
    
function scrollTo(element, to, duration, onDone) {
    var start = element.scrollTop,
        change = to - start,
        startTime = performance.now(),
        val, now, elapsed, t;

    function animateScroll(){
        now = performance.now();
        elapsed = (now - startTime)/1000;
        t = (elapsed/duration);

        element.scrollTop = start + change * easeInOutQuad(t);

        if( t < 1 )
            window.requestAnimationFrame(animateScroll);
        else
            onDone && onDone();
    };

    animateScroll();
}

function easeInOutQuad(t){ return t<.5 ? 2*t*t : -1+(4-2*t)*t };

.box{ width:80%; border:2px dashed; height:180px; overflow:auto; }
.boxChild{ 
  margin:600px 0 300px; 
  width: 40px;
  height:40px;
  background:green;
}

方法2-使用Element.scrollIntoView：

  

请注意，browser support不适用于此人

<button>Scroll to element</button>
<div class='box'>
  <div class='boxChild'></div>
</div>

var box = document.querySelector('.box'),
    targetElm = document.querySelector('.boxChild');

document.querySelector('button').addEventListener('click', function(){
   targetElm.scrollIntoView(); 
});

.box {
  width: 80%;
  border: 2px dashed;
  height: 180px;
  overflow: auto;
  scroll-behavior: smooth; /* <-- for smooth scroll */
}

.boxChild {
  margin: 600px 0 300px;
  width: 40px;
  height: 40px;
  background: green;
}

方法3-使用CSS scroll-behavior：

<button>Scroll to element</button>
<div class='box'>
  <div class='boxChild'></div>
</div>

.box {
  width: 80%;
  border: 2px dashed;
  height: 180px;
  overflow-y: scroll;
  scroll-behavior: smooth; /* <--- */
}

#boxChild {
  margin: 600px 0 300px;
  width: 40px;
  height: 40px;
  background: green;
}

Answer 4

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;

您想要滚动子顶部位置和div顶部位置之间的差异。

使用以下方式访问子元素：

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

依旧......

Answer 5

要将元素滚动到div的视图中，只有在需要时，才能使用此scrollIfNeeded函数：

function scrollIfNeeded(element, container) {
  if (element.offsetTop < container.scrollTop) {
    container.scrollTop = element.offsetTop;
  } else {
    const offsetBottom = element.offsetTop + element.offsetHeight;
    const scrollBottom = container.scrollTop + container.offsetHeight;
    if (offsetBottom > scrollBottom) {
      container.scrollTop = offsetBottom - container.offsetHeight;
    }
  }
}

document.getElementById('btn').addEventListener('click', ev => {
  ev.preventDefault();
  scrollIfNeeded(document.getElementById('goose'), document.getElementById('container'));
});

.scrollContainer {
  overflow-y: auto;
  max-height: 100px;
  position: relative;
  border: 1px solid red;
  width: 120px;
}

body {
  padding: 10px;
}

.box {
  margin: 5px;
  background-color: yellow;
  height: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#goose {
  background-color: lime;
}

<div id="container" class="scrollContainer">
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div id="goose" class="box">goose</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
</div>

<button id="btn">scroll to goose</button>

Answer 6

如果您使用的是jQuery，可以使用以下内容滚动动画：

$(MyContainerDiv).animate({scrollTop: $(MyContainerDiv).scrollTop() + ($('element_within_div').offset().top - $(MyContainerDiv).offset().top)});

动画是可选的：您还可以获取上面计算的scrollTop值，并将其直接放在容器的scrollTop属性中。

Answer 7

这是一个简单的纯JavaScript解决方案，适用于目标Number（scrollTop的值），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;
    }
};

以下是一些使用示例：

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

或

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

或

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

Answer 8

有两个事实：

1）苹果浏览器不支持组件scrollIntoView。

2）JS框架jQuery可以完成以下工作：

parent = 'some parent div has css position==="fixed"' || 'html, body';

$(parent).animate({scrollTop: $(child).offset().top}, duration)

Answer 9

本机JS，跨浏览器，平滑滚动（2019年更新）

设置ScrollTop确实可以达到预期的效果，但是滚动非常突然。不能使用jquery进行平滑滚动。因此，这是支持所有主要浏览器的完成任务的本机方法。参考-caniuse

// get the "Div" inside which you wish to scroll (i.e. the container element)
const El = document.getElementById('xyz');

// Lets say you wish to scroll by 100px, 
El.scrollTo({top: 100, behavior: 'smooth'});

// If you wish to scroll until the end of the container
El.scrollTo({top: El.scrollHeight, behavior: 'smooth'});

就是这样！

---

这是一个值得怀疑的片段-

document.getElementById('btn').addEventListener('click', e => {
  e.preventDefault();
  // smooth scroll
  document.getElementById('container').scrollTo({top: 175, behavior: 'smooth'});
});

/* just some styling for you to ignore */
.scrollContainer {
  overflow-y: auto;
  max-height: 100px;
  position: relative;
  border: 1px solid red;
  width: 120px;
}

body {
  padding: 10px;
}

.box {
  margin: 5px;
  background-color: yellow;
  height: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#goose {
  background-color: lime;
}

<!-- Dummy html to be ignored -->
<div id="container" class="scrollContainer">
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div id="goose" class="box">goose</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
  <div class="box">duck</div>
</div>

<button id="btn">goose</button>

Answer 10

用户动画滚动

以下是如何以编程方式水平滚动<div>， JQuery 的示例。要垂直滚动，您可以使用scrollLeft替换JavaScript对scrollTop的写入。

<强>的jsfiddle

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

<强> 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>

<强>的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);
 }

归功于Dux。

自动动画滚动

此外，这里有完全向左和向右滚动<div>的功能。我们唯一要改变的是在进行递归调用再次滚动之前检查是否已经使用了滚动的完整扩展。

<强>的jsfiddle

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

<强> 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>

<强>的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);
    }
}

Answer 11

这是最终为我服务的

/** 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);
}

Answer 12

使用jQuery和animate的另一个例子。

var container = $('#container');
var element = $('#element');

container.animate({
    scrollTop: container.scrollTop = container.scrollTop() + element.offset().top - container.offset().top
}, {
    duration: 1000,
    specialEasing: {
        width: 'linear',
        height: 'easeOutBounce'
    },
    complete: function (e) {
        console.log("animation completed");
    }
});

Answer 13

浏览器会自动滚动到获得焦点的元素，因此您也可以将需要滚动的元素包装到<a>...</a>中，然后在需要滚动时将焦点设置在该元素上a

Answer 14

假设您需要滚动一个div元素，请尝试这段代码

document.querySelector('div').scroll(x,y)

这在带有滚动的div内与我一起使用，如果您将鼠标指向该元素然后尝试向下或向上滚动，则该方法对您有效。如果手动工作，它也应该工作

Answer 15

我们可以在不使用JQuery和其他库的情况下解决此问题。

我为此编写了以下代码：

您具有类似的结构->

<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;
}

我们可以轻松地重写此方法以将父级和子级作为参数传递