我刚刚实现了这个，也许你可以用我的方法。

假设我们有以下HTML:

<div id="out" style="overflow:auto"></div>

然后我们可以检查它是否滚动到底部:

var out = document.getElementById("out");
// allow 1px inaccuracy by adding 1
var isScrolledToBottom = out.scrollHeight - out.clientHeight <= out.scrollTop + 1;

scrollHeight gives you the height of the element, including any non visible area due to overflow. clientHeight gives you the CSS height or said in another way, the actual height of the element. Both methods returns the height without margin, so you needn't worry about that. scrollTop gives you the position of the vertical scroll. 0 is top and max is the scrollHeight of the element minus the element height itself. When using the scrollbar it can be difficult (it was in Chrome for me) to get the scrollbar all the way down to the bottom. so I threw in a 1px inaccuracy. So isScrolledToBottom will be true even if the scrollbar is 1px from the bottom. You can set this to whatever feels right to you.

然后，只需将元素的scrollTop设置为底部即可。

if(isScrolledToBottom)
    out.scrollTop = out.scrollHeight - out.clientHeight;

我已经为你做了一个小提琴的概念:http://jsfiddle.net/dotnetCarpenter/KpM5j/

编辑: 增加了代码片段以澄清当isScrolledToBottom为真时。

Stick scrollbar to bottom const out = document.getElementById("out") let c = 0 setInterval(function() { // allow 1px inaccuracy by adding 1 const isScrolledToBottom = out.scrollHeight - out.clientHeight <= out.scrollTop + 1 const newElement = document.createElement("div") newElement.textContent = format(c++, 'Bottom position:', out.scrollHeight - out.clientHeight, 'Scroll position:', out.scrollTop) out.appendChild(newElement) // scroll to bottom if isScrolledToBottom is true if (isScrolledToBottom) { out.scrollTop = out.scrollHeight - out.clientHeight } }, 500) function format () { return Array.prototype.slice.call(arguments).join(' ') } #out { height: 100px; } <div id="out" style="overflow:auto"></div> <p>To be clear: We want the scrollbar to stick to the bottom if we have scrolled all the way down. If we scroll up, then we don't want the content to move. </p>

这个问题有原生的支持。

有一个叫做*. scrollintoview的方法。 在运行此方法一次之后，它将容器滚动保持在底部。 即使在容器中添加了新内容，它也会滚动到底部。

import {
  AfterViewInit,
  Directive,
  ElementRef,
} from '@angular/core';

@Directive({
  selector: '[aeScrollIntoView]',
})
export class ScrollIntoViewDirective implements AfterViewInit {
  constructor(private readonly el: ElementRef<HTMLDivElement>) {}
  ngAfterViewInit(): void {
    this.el.nativeElement.scrollIntoView({ behavior: 'smooth' });
  }
}

<div aeScrollIntoView>
 Your long and dynamic content. 
 Whenever new content is added to this container, it scrolls to the bottom.
<div>

. cont { 高地:100px; overflow-x:隐藏; overflow-y: auto; 用金币:rotate (180deg); 方向:rtl级; text-align:向左拐; 的 申{ 溢出:隐藏; 用金币:rotate (180deg); 的 < div级= cont”> <德> < li > 0 < / li > < li > 1 < / li > < li > 2 < / li > < li > 3 < / li > < li > 4 < / li > < li > 5 < / li > < li > 6 < / li > < li > 7 < / li > < li > 8 < / li > < li > 9 < / li > < li > 10 < / li > < /德> < / div >

单击Run代码片段查看效果。(如果运行代码片段不起作用，请尝试以下方法:https://jsfiddle.net/Yeshen/xm2yLksu/3/。)

工作原理:默认情况下溢出滚动是从上到下。Transform: rotate(180deg)将此反转，因此滚动或加载动态块是从下到上的。

创意:https://blog.csdn.net/yeshennet/article/details/88880252

基于吉姆霍尔斯的解决方案和意见。https://stackoverflow.com/a/44051405/9208887。

我额外添加了一个flex 1 1 0%的元素，以确保文本在容器未满时从顶部开始。

// just to add some numbers, so we can see the effect // the actual solution requires no javascript let num = 1001; const container = document.getElementById("scroll-container"); document.getElementById("adder").onclick = () => container.append( Object.assign(document.createElement("div"), { textContent: num++ }) ); .scroll-wrapper { height: 100px; overflow: auto; display: flex; flex-direction: column-reverse; border: 1px solid black; } .scroll-start-at-top { flex: 1 1 0%; } <div class="scroll-wrapper"> <span class="scroll-start-at-top"></span> <div id="scroll-container"> <div>1000</div> </div> </div> <button id="adder">Add Text</button>

以下是我的做法。div的高度是650px。我决定如果滚动高度在底部的150px范围内，那么自动滚动它。否则，留给用户。

if (container_block.scrollHeight - container_block.scrollTop < 800) {
                    container_block.scrollTo(0, container_block.scrollHeight);
}

这可能对你有帮助:

var element = document.getElementById("yourDivID");
element.scrollTop = element.scrollHeight;

[编辑]，为了匹配注释…

function updateScroll(){
    var element = document.getElementById("yourDivID");
    element.scrollTop = element.scrollHeight;
}

每当添加内容时，调用函数updateScroll()，或设置一个计时器:

//once a second
setInterval(updateScroll,1000);

如果你只想在用户没有移动的情况下更新:

var scrolled = false;
function updateScroll(){
    if(!scrolled){
        var element = document.getElementById("yourDivID");
        element.scrollTop = element.scrollHeight;
    }
}

$("#yourDivID").on('scroll', function(){
    scrolled=true;
});