jquery添加div实现消息聊天框

本文实例为大家分享了jquery添加div实现消息聊天框的具体代码，供大家参考，具体内容如下
上代码
<html>
<head>
<style>
* {
  margin: 0;
  padding: 0;
}

.border {
  margin-left: 300px;
  width: 900px;
  background-color: white;
  position: relative;
  border: 1px solid rgb(221, 221, 221);
}

.border .border-next {
  background-color: #dcad50;
  position: relative;
  height: 23px;
  line-height: 40px;
  display: flex;
  padding: 10px 60px 10px 80px;
}

.border-next .people {
  background-color: #dcad50;
  font-size: 20px;
  color: black;
  font-family: 楷体;
  margin-left: 300px;
}

.border .border-second {
  background-color: white;
  margin-left: 0px;
  width: 700px;
  height: 530px;
  flex: 1;
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid rgb(221, 221, 221);
  border-bottom: 1px solid rgb(221, 221, 221);
}

.border .border-img {
  background-color: white;
  margin-left: 0px;
  width: 700px;
  height: 30px;
  border-right: 1px solid rgb(221, 221, 221);
  border-bottom: 1px solid rgb(221, 221, 221);
}

.border-bottom {
  display: flex;
  width: 700px;
  height: 120px;
  background-color: white;
  overflow: auto;
  font-size: 20px;
  border-style: solid;
  border-color: #FFFFFF;
  border-right: 1px solid rgb(221, 221, 221);
}

.button {
  display: flex;
  margin-left: 530px;
}

.button .shut {
  background-color: white;
  width: 70px;
  height: 30px;
  font-size: 20px;
  text-align: center;
  border: 1px solid rgb(221, 221, 221);
}

.button .send {
  background-color: white;
  margin-left: 15px;
  width: 70px;
  height: 30px;
  font-size: 20px;
  text-align: center;
  border: 1px solid rgb(221, 221, 221);
  background-color: #DBAC50;
}

.replyChat {
  display:flex;
  width: 150px;
  background: #12B7F5;
  border-radius: 5px;
  /* 圆角 */
  position: relative;
  margin-left: 500px;
  align-content: center;
  margin-bottom: 30px;
}

.sendChat {
  display:flex;
  width: 150px;
  background: #E5E5E5;
  border-radius: 5px;
  /* 圆角 */
  position: relative;
  margin-left: 50px;
  align-content: center;
  margin-bottom: 30px;
  border-color: white white white #E5E5E5;
}

.sendChat span {
  display: inline-block;
  margin-left: 10px;
  line-height: 35px;
}

.replyChat span {
  display: inline-block;
  margin-left: 10px;
  line-height: 35px;
}

.sendChat .arrows {
  position: absolute;
  top: 5px;
  left: -16px;
  /* 圆角的位置需要细心调试哦 */
  width: 0;
  height: 0;
  font-size: 0;
  border: solid 8px;
  border-color: white #E5E5E5 white white;
}

.replyChat .arrow {
  position: absolute;
  top: 5px;
  right: -16px;
  /* 圆角的位置需要细心调试哦 */
  width: 0;
  height: 0;
  font-size: 0;
  border: solid 8px;
  border-color: white white white #12B7F5;
}

.chatTouXiang {
  width: 50px;
  height: 50px;
  border-radius: 50%; 
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  background-image: url(img/tou.png);
}
.chatCnt{

}
</style>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>聊天助手</title>
<script src="js/jquery-1.8.3.min.js"></script>
<script>
  window.οnlοad=function(){
    $(".arrow").hide();
    $(".arrows").hide();
  }
  document.onkeydown = function(e) {
    if (e.keyCode == 13 && e.ctrlKey) {
      // 这里实现换行
      document.getElementById("sendContent").value += "\n";
    } else if (e.keyCode == 13) {
      // 避免回车键换行
      e.preventDefault();
      // 下面写你的发送消息的代码
      f();
    }
  }
  function f() {
    var cnt = $("#sendContent").val();
    if(cnt == '')alert('内容不能为空');  
    if(cnt != ''){
      var node = document.createElement('div');
      node.className = 'sendChat';
      var span = document.createElement('span');
      span.innerHTML = cnt;
      var arrow = document.createElement('div');
      arrow.className = 'arrows';
      node.appendChild(span);
      node.appendChild(arrow);
      $(".border-second").append($(node));
      $("#sendContent").val('');
      $.ajax({
        data : cnt,
        type : "post",
        url : "CharServlet?id=" + cnt,
        dataType : "json",
        success : function(msg) {
          var node = document.createElement('div');
          node.className = 'replyChat';
          var span = document.createElement('span');
          span.innerHTML = msg.text;
          var arrow = document.createElement('div');
          arrow.className = 'arrow';
          node.appendChild(arrow);
          node.appendChild(span);

          $(".border-second").append($(node));

          var boderSecondDiv = $('.border-second');
          var lastChild = boderSecondDiv[0].lastChild;
          var lastChildH = lastChild.offsetTop;
          var h = 0;
          for (var i = 0, len = lastChild.children.length; i < len; i++) {

            h += lastChild.children[i].offsetHeight;
          }
          boderSecondDiv[0].scrollTop = lastChildH + h;

        },
        error : function(msg) {
          alert("请求失败");
        }
      });
    }
  }
</script>
</head>

<div class="frame">
  <div class="border">
    <div class="border-next">
      <div class="people">聊天助手</div>
    </div>
    <div class="border-second">
      <div class="chatCnt">
      <div class="chatTouXiang"></div> 
      <div class="sendChat">
        <span></span>
        <div class="arrows"></div>
      </div>
      </div>
      <div class="replyChat">
        <span></span>
        <div class="arrow"></div>
      </div>
      <br>
    </div>
    <div class="border-img"></div>
    <textarea id="sendContent" class="border-bottom"></textarea>
    <div class="button">
      <button class="shut">关闭</button>
      <button id="selectBtn" class="send" onclick="f()">发送</button>
    </div>

  </div>
</div>
</body>
</html>
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jquery添加div实现消息聊天框

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