前端js代码模拟对话，这也是面试官的一道面试题。需要的拿走~~~
原理：点击顶部头像切换发消息的好友，实现如下对话。。。
实现界面如下：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>模拟聊天</title>
<style>
*{
margin: 0;
padding:0;
}
.container{
display: flex;
width: 100%;
height: 500px;
justify-content: center;
}
#box{
width: 350px;
height: 500px;
background-color: gainsboro;
}
.top{
position: absolute;
margin-top: 0;
width: 350px;
height: 70px;
background-color: #5eb268;
}
.talk{
position: absolute;
margin-top: 70px;
width: 350px;
height: 360px;
}
.bottom{
position: absolute;
margin-top:430px ;
width: 350px;
height: 70px;
}
.showTxt{
width: auto;
height: auto;
max-width: 230px;
border:0;
font-size: 15px;
line-height: 40px;
border-radius: 2px;
word-break: break-all;
list-style: none;
margin-top: 5px;
display: list-item;
}
.left{
padding-right: 5px;
text-align: left;
margin-left: 5px;
float: left;
background-color: #e1e9e1;
}
.right{
padding-left:5px ;
text-align: right;
margin-right: 5px;
float: right;
background-color: #e1e9e1;
}
img{
width: 50px;
height: 50px;
border-radius: 50%;
}
.Img{
margin-left: 40%;
margin-top: 10px;
margin-bottom: 10px;
}
.Itmg{
float: left;
width: 40px;
height: 40px;
border-radius: 50%;
}
.rtmg{
float: right;
width: 40px;
height: 40px;
}
input{
float: left;
border-style: none;
width: 250px;
height: 45px;
border-radius: 5%;
background-color: gainsboro;
}
.txt{
margin-left: 10px;
background-color: #fdfdff;
}
.btn{
margin-left:7px;
width: 70px;
background-color: #5eb268;
color: white;
}
</style>
</head>
<body>
<div class="container">
<div id="box">
<div class="top">
<img class="Img" src="demo1.jpeg">
</div>
<div class="talk">
<ul>
<!--<li class="left showTxt"><img class="Itmg" src="demo1.jpeg">dsczdc</li>
<div style="clear: both"></div>
<li class="right showTxt"><img class="rtmg" src="demo6.jpg">sdasdfsdfc</li>-->
</ul>
</div>
<div class="bottom"><input type="text" class="txt"><input class="btn" type="button" value="发送"></div>
</div>
</div>
<script>
var box=document.getElementById('box');
var top=document.getElementsByClassName('top')[0];
var talk=document.getElementsByClassName('talk')[0];
var bottom=document.getElementsByClassName('bottom')[0];
var txt=document.getElementsByClassName('txt')[0];
var btn=document.getElementsByClassName('btn')[0];
var Img=document.getElementsByClassName('Img')[0];
var UL=document.getElementsByTagName('ul')[0];
//点击顶部头像切换聊天人
var num=0;
Img.onclick=function(){
num++;
if(num%2==0){
Img.src='demo1.jpeg'
}else{
Img.src='demo6.jpg'
}
};
//发送的事件
btn.onclick=function(){
addcontent();
};
function addcontent(){
var LI=document.createElement('li');
var newimg=document.createElement('img');
//判断聊天对象是那边
var b=document.createElement('p');
b.style.clear='both';
UL.appendChild(b)
if(num%2==0){
//添加对话框
LI.innerHTML=txt.value;
LI.className='left showTxt';
UL.appendChild(LI);
txt.value='';
//添加头像
newimg.src=Img.src;
newimg.className='Itmg';
LI.appendChild(newimg);
//清除浮动
var p=document.createElement('p');
p.style='clear:both';
UL.appendChild('p');
}else{
//添加对话框
LI.innerHTML=txt.value;
LI.className='right showTxt';
UL.appendChild(LI);
txt.value='';
//添加头像
newimg.src=Img.src;
newimg.className='rtmg';
LI.appendChild(newimg);
//清除浮动
var p=document.createElement('p');
p.style='clear:both';
UL.appendChild('p');
}
}
</script>
</body>
</html>