如何自动滚动聊天框
HTML：
<!DOCTYPE html>
<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="robots" content="noindex">
<title>College Enquiry Chat</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="assets/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="assets/js/jquery-1.10.2.min.js"></script>
<script src="assets/js/bootstrap.min.js"></script>
<script type="text/javascript">
window.alert = function(){};
var defaultCSS = document.getElementById('bootstrap-css');
function changeCSS(css){
if(css) $('head > link').filter(':first').replaceWith('<link rel="stylesheet" href="'+ css +'" type="text/css" />');
else $('head > link').filter(':first').replaceWith(defaultCSS);
}
</script>
</head>
<body>
<div class="panel panel-primary" style="border:0px">
<div class="panel-heading top-bar">
<div class="col-md-8 col-xs-8">
<h3 class="panel-title"><span class="glyphicon glyphicon-comment" style="margin-right:6px;"></span>College Enquiry Chat</h3>
</div>
</div>
<div class="panel-body msg_container_base">
<div class="row msg_container base_sent">
<div class="col-md-10 col-xs-10">
<div class="messages msg_sent">
<p>that mongodb thing looks good, huh?
tiny master db, and huge document store</p>
</div>
</div>
</div>
<div class="row msg_container base_receive">
<div class="col-md-10 col-xs-10">
<div class="messages msg_receive">
<p>that mongodb thing looks good, huh?
tiny master db, and huge document store</p>
</div>
</div>
</div>
<chat_log> . </chat_log>
</div>
<!--CHAT USER BOX-->
<div class="panel-footer">
<div class="input-group" id="myForm">
<input id="btn-input" type="text" class="form-control input-sm chat_input" placeholder="Write your message here...">
<span class="input-group-btn">
<button class="btn btn-primary btn-sm" id="submit" type="submit">Send</button>
</span>
</form>
</div>
</div>
</div>
</div>
</div>
</div>
使用Javascript：
<script>
$("#submit").click(function() {
var data = $("#btn-input").val();
//console.log(data);
$('chat_log').append('<div class="row msg_container base_sent"><div class="col-md-10 col-xs-10"><div class="messages msg_receive"><p>'+data+'</p></div></div></div><div class="row msg_container base_receive"><div class="col-md-10 col-xs-10"><div class="messages msg_receive"><p>'+data+'</p></div></div></div>');
clearInput();
});
function clearInput() {
$("#myForm :input").each(function() {
$(this).val(''); //hide form values
});
}
$("#myForm").submit(function() {
return false; //to prevent redirection to save.php
});
</script>
CSS：
.msg_container_base{
background: #e5e5e5;
margin: 0;
padding: 0 10px 10px;
max-height:80vh;
overflow-x:hidden;
}
.top-bar {
background: #666;
color: white;
padding: 10px;
position: relative;
overflow: hidden;
}
.msg_receive{
padding-left:0;
margin-left:0;
}
.msg_sent{
padding-bottom:20px !important;
margin-right:0;
}
.messages {
background: white;
padding: 10px;
border-radius: 2px;
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
max-width:100%;
}
.messages > p {
font-size: 13px;
margin: 0 0 0.2rem 0;
}
.messages > time {
font-size: 11px;
color: #ccc;
}
.msg_container {
padding: 10px;
overflow: hidden;
display: flex;
}
img {
display: block;
width: 100%;
}
.avatar {
position: relative;
}
.base_receive > .avatar:after {
content: "";
position: absolute;
top: 0;
right: 0;
width: 0;
height: 0;
border: 5px solid #FFF;
border-left-color: rgba(0, 0, 0, 0);
border-bottom-color: rgba(0, 0, 0, 0);
}
.base_sent {
justify-content: flex-end;
align-items: flex-end;
}
.base_sent > .avatar:after {
content: "";
position: absolute;
bottom: 0;
left: 0;
width: 0;
height: 0;
border: 5px solid white;
border-right-color: transparent;
border-top-color: transparent;
box-shadow: 1px 1px 2px rgba(black, 0.2); // not quite perfect but close
}
.msg_sent > time{
float: right;
}
.msg_container_base::-webkit-scrollbar-track
{
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
background-color: #F5F5F5;
}
.msg_container_base::-webkit-scrollbar
{
width: 12px;
background-color: #F5F5F5;
}
.msg_container_base::-webkit-scrollbar-thumb
{
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
background-color: #555;
}
.btn-group.dropup{
position:fixed;
left:0px;
bottom:0;
}
以下代码功能显示，用户输入什么，当点击发送时，用户将看到，他的发送信息以两种方式发送..一个在发送和放大收到表格。
有没有办法自动滚动到底部
答案 0 :(得分：10)
将此添加到您的代码中：
$(".msg_container_base").stop().animate({ scrollTop: $(".msg_container_base")[0].scrollHeight}, 1000);
所以提交点击功能如下所示：
$("#submit").click(function() {
var data = $("#btn-input").val();
//console.log(data);
$('chat_log').append('<div class="row msg_container base_sent"><div class="col-md-10 col-xs-10"><div class="messages msg_receive"><p>'+data+'</p></div></div></div><div class="row msg_container base_receive"><div class="col-md-10 col-xs-10"><div class="messages msg_receive"><p>'+data+'</p></div></div></div>');
clearInput();
$(".msg_container_base").stop().animate({ scrollTop: $(".msg_container_base")[0].scrollHeight}, 1000);
});
答案 1 :(得分：3)
检查这个小提琴。您只需将scrollTop()添加到.msg-container-base
答案 2 :(得分：3)
我有这样简单的代码解决方案：测试并且它有效，解释：div有id聊天窗口，我们使用scrollTo方法，我们从0开始并在聊天窗口底部滚动，我们如何到达底部？只需使用滚动高度，我们就可以获得聊天窗口的高度，并在聊天窗口中永久保持向下滚动
chatWindow = document.getElementById('chat-window');
var xH = chatWindow.scrollHeight;
chatWindow.scrollTo(0, xH);<div id="chat-window"></div>
答案 3 :(得分：2)
由于您似乎正在使用JQuery，因此您可以使用animate函数顺利完成此操作。
$('#myMessageContainer').stop ().animate ({
scrollTop: $('#myMessageContainer')[0].scrollHeight
});
答案 4 :(得分：1)
非常简单的代码，用于检查用户是否在底部。 如果用户位于底部，则聊天页面将自动滚动并显示新消息。 如果用户向上滚动，则页面不会自动滚动到底部。
JS代码-
var checkbottom;
jQuery(function($) {
$('.chat_screen').on('scroll', function() {
var check = $(this).scrollTop() + $(this).innerHeight() >= $(this)
[0].scrollHeight;
if(check) {
checkbottom = "bottom";
}
else {
checkbottom = "nobottom";
}
})
});
window.setInterval(function(){
if (checkbottom=="bottom") {
var objDiv = document.getElementById("chat_con");
objDiv.scrollTop = objDiv.scrollHeight;
}
}, 500);
html代码-
<div id="chat_con" class="chat_screen">
</div>
答案 5 :(得分：1)
尝试在开始和结束消息附加功能之前添加这些行。 它对我有用。
document.getElementById('chatbox').scrollIntoView({block: 'end', behavior: 'smooth'});
//message function
document.getElementById('chatbox').scrollIntoView({block: 'end', behavior: 'smooth'});答案 6 :(得分：0)
.wrapword {
white-space: -moz-pre-wrap !important; /* Mozilla, since 1999 */
white-space: -pre-wrap; /* Opera 4-6 */
white-space: -o-pre-wrap; /* Opera 7 */
white-space: pre-wrap; /* css-3 */
word-wrap: break-word; /* Internet Explorer 5.5+ */
white-space: -webkit-pre-wrap; /* Newer versions of Chrome/Safari*/
word-break: break-all;
white-space: normal;
}
div,table {
background: #eee;
border: 2px solid #aaa;
padding: 15px;
}<table>
<tr>
<td class="wrapword">xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</td>
<td class="wrapword">xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</td>
<td class="wrapword">xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</td>
</tr>
</table>
<br>
<div class="wrapword">
ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
</div>