我想更改聊天框中显示的消息的边框，它应该与图像中的边框一样，请建议如何实现它，因为我不知道如何做到。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Example</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<style type="text/css">
body{margin-top:20px;}
@import url(https://fonts.googleapis.com/css?family=Oswald:400,300);
@import url(https://fonts.googleapis.com/css?family=Open+Sans);
body
{
font-family: 'Open Sans', sans-serif;
}
.chat_box .chat_message_wrapper ul.chat_message > li + li {
margin-top: 4px;
}
.chat_box_wrapper.chat_box_small.chat_box_active {
background:#e1e3e5;
height: 600px;
overflow-y: auto;
width: 450px;
}
.chat_box {
padding: 16px;
}
.chat_box .chat_message_wrapper::after {
clear: both;
}
.chat_box .chat_message_wrapper::after, .chat_box .chat_message_wrapper::before {
content: " ";
display: table;
}
.chat_box .chat_message_wrapper .chat_user_avatar {
float: left;
}
.chat_box .chat_message_wrapper {
margin-bottom: 20px;
}
.md-user-image {
border-radius: 50%;
width: 48px;
height:48px;
}
img {
border: 0 none;
box-sizing: border-box;
height: auto;
max-width: 100%;
vertical-align: middle;
}
.chat_box .chat_message_wrapper ul.chat_message, .chat_box .chat_message_wrapper ul.chat_message > li {
list-style: outside none none;
padding: 0;
}
.chat_box .chat_message_wrapper ul.chat_message {
float: left;
margin: 0 0 0 20px;
max-width: 67%;
}
.chat_box.chat_box_colors_a .chat_message_wrapper ul.chat_message > li:first-child::before {
border-right-color: #616161;
}
.chat_box .chat_message_wrapper ul.chat_message > li:first-child::before {
border-color: transparent #ededed transparent transparent;
border-style: solid;
border-width: 0 16px 16px 0;
content: "";
height: 0;
left: -14px;
position: absolute;
top: 0;
width: 0;
}
.chat_box.chat_box_colors_a .chat_message_wrapper ul.chat_message > li {
background: #FCFBF6 none repeat scroll 0 0;
color: #000000;
}
.chat_box .chat_message_wrapper ul.chat_message > li {
background: #ededed none repeat scroll 0 0;
border-radius: 4px;
clear: both;
color: #212121;
display: block;
float: left;
font-size: 13px;
padding: 8px 16px;
position: relative;
word-break: break-all;
}
.chat_box .chat_message_wrapper ul.chat_message, .chat_box .chat_message_wrapper ul.chat_message > li {
list-style: outside none none;
padding: 0;
}
.chat_box .chat_message_wrapper ul.chat_message > li {
margin: 0;
}
.chat_box .chat_message_wrapper ul.chat_message > li p {
margin: 0;
}
.chat_box.chat_box_colors_a .chat_message_wrapper .chat_message_time {
color: rgba(185, 186, 180, 0.9);
}
.chat_box .chat_message_wrapper .chat_message_time {
color: #e1e3e5;
text-align:center;
display: block;
font-size: 11px;
padding-top: 2px;
font-size:14px;
text-transform: uppercase;
}
.chat_box .chat_message_wrapper.chat_message_right .chat_user_avatar {
float: right;
}
.chat_box .chat_message_wrapper.chat_message_right ul.chat_message {
float: right;
margin-left: 0 !important;
margin-right: 24px !important;
}
.chat_box.chat_box_colors_a .chat_message_wrapper.chat_message_right ul.chat_message > li:first-child::before {
border-left-color: #83acc5;
}
.chat_box.chat_box_colors_a .chat_message_wrapper ul.chat_message > li:first-child::before {
border-right-color: #FCFBF6;
}
.chat_box .chat_message_wrapper.chat_message_right ul.chat_message > li:first-child::before {
border-color: transparent transparent transparent #ededed;
border-width: 0 0 29px 29px;
left: auto;
right: -14px;
}
.chat_box .chat_message_wrapper ul.chat_message > li:first-child::before {
border-color: transparent #ededed transparent transparent;
border-style: solid;
border-width: 0 29px 29px 0;
content: "";
height: 0;
left: -14px;
position: absolute;
top: 0;
width: 0;
}
.chat_box.chat_box_colors_a .chat_message_wrapper.chat_message_right ul.chat_message > li {
background: #83acc5 none repeat scroll 0 0;
}
.chat_box .chat_message_wrapper ul.chat_message > li {
background: #ededed none repeat scroll 0 0;
border-radius: 12px;
clear: both;
color: #212121;
display: block;
float: left;
font-size: 13px;
padding: 8px 16px;
position: relative;
}
</style>
</head>
<body>
<div class="container">
<div id="chat" class="chat_box_wrapper chat_box_small chat_box_active" style="opacity: 1; display: block; transform: translateX(0px);">
<div class="chat_box touchscroll chat_box_colors_a">
<div class="chat_message_wrapper">
<div class="chat_user_avatar">
<a href="https://web.facebook.com/iamgurdeeposahan" target="_blank" >
<img src="http://bootdey.com/img/Content/avatar/avatar1.png" class="md-user-image">
</a>
</div>
<span class="chat_message_time">13:38</span>
<ul class="chat_message">
<li>
<p> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio, eum? </p>
</li>
<li>
<p> Lorem ipsum dolor sit amet </p>
</li>
</ul>
</div>
<div class="chat_message_wrapper chat_message_right">
<div class="chat_user_avatar">
<a href="https://web.facebook.com/iamgurdeeposahan" target="_blank" >
<img src="http://bootdey.com/img/Content/avatar/avatar1.png" class="md-user-image">
</a>
</div>
<span class="chat_message_time">13:34</span>
<ul class="chat_message">
<li>
<p>
Lorem ipsum dolor sit amet, consectetur adipisicing elit. natus nulla perspiciatis quae quasi, quis recusandae, saepe, sunt totam.
</p>
</li>
</ul>
</div>
<div class="chat_message_wrapper chat_message_right">
<div class="chat_user_avatar">
<a href="https://web.facebook.com/iamgurdeeposahan" target="_blank" >
<img src="http://bootdey.com/img/Content/avatar/avatar1.png" class="md-user-image">
</a>
</div>
<span class="chat_message_time">13:34</span>
<ul class="chat_message">
<li>
<p>
Lorem ipsum dolor sit amet, consectetur adipisicing elit.atus nulla perspiciatis quae quasi, quis recusandae, saepe, sunt totam.
</p>
</li>
</ul>
</div>
<div class="chat_message_wrapper">
<div class="chat_user_avatar">
<a href="https://web.facebook.com/iamgurdeeposahan" target="_blank" >
<img src="http://bootdey.com/img/Content/avatar/avatar1.png" class="md-user-image">
</a>
</div>
<span class="chat_message_time">13:34</span>
<ul class="chat_message">
<li>
<p> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Distinctio, eum? </p>
</li>
<li>
<p> Lorem ipsum dolor sit amet </p>
</li>
</ul>
</div>
</div>
</div>
</body>
</html>
我的形象：
最佳答案
具有径向渐变背景的定位伪元素怎么样？
这应该使您接近。
.chat {
width: 50%;
height: 75px;
margin: 1em auto;
border-radius: 12px;
background: darkseagreen;
position: relative;
}
.left {
border-bottom-left-radius: 0;
}
.right {
border-bottom-right-radius: 0;
}
.chat::after {
content: '';
width: 1.5em;
height: 1.5em;
position: absolute;
bottom: 0;
}
.left::after {
left: 0;
transform: translateX(-100%);
background: radial-gradient(circle at 0 0, transparent, transparent 72%, darkseagreen 72%);
}
.right::after {
right: 0;
transform: translateX(100%);
background: radial-gradient(circle at 100% 0, transparent, transparent 72%, darkseagreen 72%);
}<div class="chat left"></div>
<div class="chat right"></div>关于css - 如何更改此聊天框的边框，使其看起来像所附图像中的边框，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39246210/