本文实例为大家分享了js实现简易聊天对话框的具体代码,供大家参考,具体内容如下

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>聊天对话框</title>
<style type="text/css">
*{font-size: 14px; padding:0; margin:0;}
.main{
 position: relative;
 margin: 20px auto;
 border: 1px solid steelblue;
 width: 430px;
 height: 400px;
}
.msgInput{
 display: block;
 width: 406px;
 height: 60px;
 margin: 10px auto;

}
.sendbtn{
 position: absolute;
 width: 100px;
 height: 29px;
 bottom: 5px;
 right: 10px;
}
.content{
 list-style: none;
 width: 410px;
 height: 280px;
 margin: 5px auto;
 border: 1px dotted #D1D3D6;
 overflow-y: scroll;
}
.msgContent{
 width:auto;
 max-width: 250px;
 height: auto;
 word-break: break-all;
 margin: 5px;
 padding: 3px;
 border-radius: 5px;
}

.content .left{
 float: left;
 text-align: left;
 background-color: lightgrey;
}
.content .right{
 float: right;
 text-align: right;
 background-color: yellowgreen;
}


</style>
<script type="text/javascript">
 window.onload=function(){

 var input = document.getElementById('msg_input');//查找缓存
 document.getElementById('sendbtn').onclick=function () {
  //var input1 = document.getElementById('msg_input');//
  //input0

  sendMsg();
 }



 //快捷键 发送
 document.onkeypress = function (event) {
  var e = event || window.event;
  var keycode = e.keyCode || e.which;
  console.log(e)
  if( keycode==10){//判断同时按下ctrl 和enter
  sendMsg()
  }
 }

 function sendMsg() {
  var input = document.getElementById('msg_input');//查找缓存
  var ul = document.getElementById('content');

  var newLi = document.createElement('li');
  newLi.innerHTML = input.value;
  newLi.className = 'msgContent right';
  ul.appendChild(newLi);

  var div = document.createElement('div');
  div.style = 'clear:both';
  ul.appendChild(div);




  ajax({
  url:'http://jisuznwd.market.alicloudapi.com/iqa/query"Content-Type","application/x-www-form-urlencoded");
 xhr.setRequestHeader("Authorization","APPCODE 3e9dfb924f464e9593a95f9d2bbf4348")


 // {username:'zhangsa',password:123123}
// sendData = encodeURIComponent(sendData);


 // 发送请求
 //console.log(res);
 //回调函数
 xhr.onreadystatechange = function () {
//  console.log(xhr.readyState)
  if(xhr.readyState == 4){
  //数据接收完毕
  if(xhr.status == 200){
//   console.log('请求成功',xhr.responseText)
   if(obj.success){
   obj.success(xhr.responseText)
   }

  }else{
//   console.log(xhr.status,'请求出错')
   if(obj.failure){
   obj.failure('请求失败')
   }
  }
  }
 }
//  var sendData = 'username=zhangsan&password=123456';
 if( obj.method == undefined ||obj.method.toLowerCase() =='get'){
  xhr.send(null);//
 }else{
  xhr.send(obj.params);//

 }
 }


</script>

</head>

<body>
 <div id="main" class="main">
 <ul id="content" class="content">
  <li class="msgContent left">hello"clear:both"></div>
  <li class="msgContent left">hello</li>
  <div style="clear:both"></div>
  <li class="msgContent right">hi</li>
  <div style="clear:both"></div>
  <li class="msgContent left">hehe</li>
  <div style="clear:both"></div>
  <li class="msgContent left">goodbye</li>
  <div style="clear:both"></div>
  <li class="msgContent right">。。。。</li>
  <div style="clear:both"></div>
  <li class="msgContent right">sdfasdsadfd fasd fasd fasdfasdfasdf</li>
  <div style="clear:both"></div>
  <li class="msgContent right"> 哈哈</li>
  <div style="clear:both"></div>
 </ul>
 <textarea id="msg_input" class="msgInput"></textarea>
 <button id="sendbtn" class="sendbtn">发送</button>
 </div>
</body>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。

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