CSS实现聊天布局

<template>
<!-- 外部容器 -->
  <div class="chatContainer">
    <!-- 聊天窗口 -->
    <div class="chat">
      <!-- 左侧导航 -->
      <div class="nav">
        <div class="btn">
          <div class="item"></div>
          <div class="item"></div>
          <div class="item"></div>
        </div>
        <div class="menu">
          <div class="menu-top">
            <ul>
              <li class="avatar"><img src="https://pic.cnblogs.com/avatar/2354315/20210416231335.png" alt=""></li>
              <li @click="nohave"><span class="iconfont icon-chat">&#xe622;</span></li>
              <li @click="nohave"><span class="iconfont icon-renqun">&#xe718;</span></li>
              <li @click="nohave"><span class="iconfont icon-wenjian">&#xe621;</span></li>
            </ul>
          </div>
          <div @click="nohave" class="menu-bot">
            <span class="iconfont icon-caidan">&#xe61f;</span>
          </div>
        </div>
      </div>
      <!-- 对话列表模块 -->
      <div class="chatlist">
        <!-- 搜索框 -->
        <div contenteditable="true" class="search">
          <span class="iconfont icon-search">&#xe624;</span>
        </div>
        <!-- 对话列表 -->
        <div class="list-con">
          <ul>
            <li v-for="(item,index) in [1,2,3,4,5,6,7,8,9]" :key="index">
              <!-- 对话 -->
              <div class="list-item">
                <!-- 对话者的头像 -->
                <div class="list-avatar">
                  <img src="https://pic.cnblogs.com/avatar/2354315/20210416231335.png" alt="">
                </div>
                <!-- 对话者的信息 -->
                <div class="list-info">
                  <h3 class="list-nickname">hmy66</h3>
                  <div class="list-brief">吃饭了么吗吃饭了吗</div>
                </div>
              </div>
            </li>
          </ul>
        </div>
      </div>
      <!-- 聊天内容 -->
      <div class="Content">
        <div class="Content_top">
          <p class="nickname">hmy666</p>
          <span @click="nohave" class="iconfont">&#xe626;</span>
        </div>
        <div class="chatContent">
          <div class="chatItem" v-for="(item,index) in chatContent" :key="index" :class="item.fromUser=='me' ? 'reverse' : ''">
            <div class="avatar">
              <!-- 头像 -->
             <img style="width:100%;" :src="item.avatar" alt="">
             
            </div>
            <div class="chatItemContent">
              {{item.contentWord}}
            </div>
          </div>
        </div>
        <div class="input">
          <div class="input-icon">
            <span @click="nohave" class="iconfont icon-biaoqin">&#xe7df;</span>
            <span @click="nohave" class="iconfont icon-shipin">&#xe638;</span>
            <span @click="nohave" class="iconfont icon-wenjian">&#xe66f;</span>
          </div>
          <div class="send">Send</div>
          <textarea placeholder="input your words" name="chatTextarea" id="chatTextarea" >
          </textarea>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  export default {
    name:'chat',
    data() {
      return {
        chatContent: [
          {
            fromUser:'me',
            from_nickname:'小仙女',
            avatar:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic3.zhimg.com%2F50%2Fv2-6f1c492cbdfe3c24aae44e935a796d5a_hd.jpg&refer=http%3A%2F%2Fpic3.zhimg.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1622200020&t=a8f31f8ed10a7d1e6bddbf8402f71590',
            contentWord:'吃饭了么？'
          },
          {
            fromUser:'nome',
            from_nickname:'大可爱',
            avatar:'https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=1275343176,638979170&fm=26&gp=0.jpg',
            contentWord:'没有啊!'
          },
          {
            fromUser:'me',
            from_nickname:'小仙女',
            avatar:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic3.zhimg.com%2F50%2Fv2-6f1c492cbdfe3c24aae44e935a796d5a_hd.jpg&refer=http%3A%2F%2Fpic3.zhimg.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1622200020&t=a8f31f8ed10a7d1e6bddbf8402f71590',
            contentWord:'那要去哪里吃啊？'
          },
          {
            fromUser:'nome',
            from_nickname:'大可爱',
            avatar:'https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=1275343176,638979170&fm=26&gp=0.jpg',
            contentWord:'吃屎啊!'
          },
          {
            fromUser:'me',
            from_nickname:'小仙女',
            avatar:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic3.zhimg.com%2F50%2Fv2-6f1c492cbdfe3c24aae44e935a796d5a_hd.jpg&refer=http%3A%2F%2Fpic3.zhimg.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1622200020&t=a8f31f8ed10a7d1e6bddbf8402f71590',
            contentWord:'666666666666666666666666666666666666666666666!'
          },
          {
            fromUser:'me',
            from_nickname:'小仙女',
            avatar:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic3.zhimg.com%2F50%2Fv2-6f1c492cbdfe3c24aae44e935a796d5a_hd.jpg&refer=http%3A%2F%2Fpic3.zhimg.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1622200020&t=a8f31f8ed10a7d1e6bddbf8402f71590',
            contentWord:'正常文字的换行(亚洲文字和非亚洲文字)元素拥有默认的white-space:normal,当定义的宽度之后自动换行'
          },
          {
            fromUser:'me',
            from_nickname:'小仙女',
            avatar:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic3.zhimg.com%2F50%2Fv2-6f1c492cbdfe3c24aae44e935a796d5a_hd.jpg&refer=http%3A%2F%2Fpic3.zhimg.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1622200020&t=a8f31f8ed10a7d1e6bddbf8402f71590',
            contentWord:'abababababababababababababababababababababaab'
          },
          {
            fromUser:'me',
            from_nickname:'小仙女',
            avatar:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic3.zhimg.com%2F50%2Fv2-6f1c492cbdfe3c24aae44e935a796d5a_hd.jpg&refer=http%3A%2F%2Fpic3.zhimg.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1622200020&t=a8f31f8ed10a7d1e6bddbf8402f71590',
            contentWord:'ab ab ab ab ababa bababab abababa babababa babababaab'
          },
          ]
      }
    },
    methods: {
      nohave(){
         innerWidth > 768
          ? this.$message({
              message: "功 能 未 开 放 !",
              duration: 1500,
              type: 'warning'
            })
          : this.$toast.show("功 能 未 开 放 !", 1500);
      }
    },
  }
</script>

<style lang="less" scoped>
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  list-style: none;
}
ul{
  margin-block-start: 0em;
  margin-block-end: 0em;
  margin-inline-start: 0px;
  margin-inline-end: 0px;
  padding-inline-start: 0px;
}
// 容器
.chatContainer{
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: url("https://ncdn.camarts.cn/c9ed9ea1.jpg") center;
  background-size: cover;
}
// 聊天窗口
// 左侧导航
.chat{
  width: 95%;
  height: 90%;
  border-radius: 10px;
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(4px);
  display: grid;
  grid-template-columns: 70px 1fr 2fr;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  .nav{
    width: 70px;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: grid;
    grid-template-rows: 30px 1fr;
    .btn{
      width: 100%;
      height: 30px;
      display: grid;
      grid-template-columns: repeat(3,1fr);
      align-items: center;
      padding: 0 4px;
      .item{
        width: 12px;
        height: 12px;
        border-radius: 50%;
        margin: auto;
      }
      .item:nth-child(1){
        background-color: #eb5a56;
      }
      .item:nth-child(2){
        background-color: #f8bc33;
      }
      .item:nth-child(3){
        background-color: #62cb44;
      }
    }
    .menu{
      display: grid;
      grid-template-rows: 1fr 50px;
      justify-content: center;
      .menu-top{
        width: 100%;
        display: flex;
        .avatar img{
          width: 1rem;
          border-radius: 5%;
        }
        ul li{
          padding: 10px 0 20px;
          text-align: center;
        }
        ul li .iconfont{
          font-size: 0.8rem;
          color: rgba(255, 255, 255, 0.9);
        }
      }

    }
  }
    .chatlist::-webkit-scrollbar {
  /*滚动条整体样式*/
  width : 10px;  /*高宽分别对应横竖滚动条的尺寸*/
  height: 1px;
  }
  .chatlist::-webkit-scrollbar-thumb {
  /*滚动条里面小方块*/
  border-radius   : 10px;
  background-color: skyblue;
  background-image: -webkit-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.2) 25%,
      transparent 25%,
      transparent 50%,
      rgba(255, 255, 255, 0.2) 50%,
      rgba(255, 255, 255, 0.2) 75%,
      transparent 75%,
      transparent
  );
  }
  .chatlist::-webkit-scrollbar-track {
  /*滚动条里面轨道*/
  box-shadow   : inset 0 0 5px rgba(0, 0, 0, 0.2);
  background   : #ededed;
  border-radius: 10px;
  }

  .chatlist{
    position: relative;
    overflow-y: scroll;
    overflow-x: hidden;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.5);
    display: grid;
    grid-template-rows: 70px 1fr;
    justify-content: center;
    align-items: center;
    .search{
      position: relative;
      overflow: hidden;
      width: 6rem;
      height: 1rem;
      border-radius: 5px;
      background-color: rgba(255, 255, 255, 0.7);
      display: flex;
      align-items: center;
      // justify-content: flex-end;
      font-size: 0.5rem;
      padding-right: 14px;
      .icon-search{
        font-size: 0.5rem;
        position: absolute;
        right: 3%;
      }
    }
    .list-con{
      user-select: none;
      width: 100%;
      height:100%;
      .list-item{
        border-top: 1px solid rgba(0, 0, 0, 0.1);
        position: relative;
        cursor: pointer;
        width: 100%;
        height: 1.2rem;
        display: grid;
        grid-template-columns: 1.2rem 1fr;
        align-items: center;
        justify-content: center;
        box-sizing: content-box;
        padding-bottom: 10px;
        padding-top: 10px;
        .list-avatar{
          width: 1.2rem;
          height: 1.2rem;
          img{
            width: 100%;
            border-radius: 4px;
          }
        }
        .list-info{
          // overflow: hidden; 
         
        }
        .list-info .list-nickname{
          font-size: 14px;
          font-weight: 600;
          padding-left:10px;
          line-height: 1.8;
        }
        .list-info .list-brief{
          font-size: 14px;
          font-weight: 400;
          padding-left: 10px;
          width: 80%;
          overflow: hidden; 
          text-overflow:ellipsis;
          white-space: nowrap;
        }
      }
      .list-item:hover{
        background-color: rgba(0, 0, 0, 0.1);
      }
    }
  }
  .Content{
    position: relative;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.2);
    display: grid;
    grid-template-rows: 70px 1fr 160px;
    align-items: center;
    .Content_top{
      color: #303030;
      display: flex;
      justify-content: space-between;
      padding-left: 20px;
      padding-right: 20px;
      border-bottom: solid 1px rgba(255, 255, 255, 0.1);
      .nickname{
        line-height:2rem;
      }
      span{
        line-height: 2rem;
      }
    }
    .chatContent::-webkit-scrollbar{
      width: 0px;
    }
    .chatContent{
      position: absolute;
      top: 2rem;
      width: 100%;
      height: calc(100% - 6rem);
      overflow-x: hidden;
      overflow-y: scroll;
      .reverse{
        flex-direction: row-reverse;
        .chatItemContent{
          margin-right: 8px;
          border-bottom-left-radius: 5px ;
          border-bottom-right-radius: 5px ;
          border-top-left-radius: 5px ;
          border-top-right-radius: 0px ;
        }
        .chatItemContent::after{
          content: '';
          position: absolute;
          top: 10%;
          right: -5px;
          height: 0px;
          width: 0px;
          border-left:5px solid rgba(0, 0, 0, 0.5);
          border-top:5px solid transparent ;
          border-bottom:5px solid transparent;
        }
        .chatItemContent::before{
          display: none;
        }
      }
      .chatItem{
        margin: 10px;
        display: flex;
        .avatar{
          width: 1.1rem;
          height: 1.1rem;
          border-radius: 50%;
          overflow: hidden;
        }
        .chatItemContent{
          font-size: 0.6rem;
          padding: 5px;
          border-bottom-left-radius: 5px ;
          border-bottom-right-radius: 5px ;
          border-top-right-radius: 5px ;
          max-width: 50%;
          overflow-wrap: break-word;
          position: relative;
          margin-left: 8px ;
          color: #ffffff;
          background-color: rgba(0, 0, 0, 0.5);
        }
        .chatItemContent::before{
          content: '';
          position: absolute;
          top: 10%;
          left: -5px;
          height: 0px;
          width: 0px;
          border-right:5px solid rgba(0, 0, 0, 0.5);
          border-top:5px solid transparent ;
          border-bottom:5px solid transparent;
        }
      }
    }
    .input{
      position: absolute;
      bottom: 0%;
      background-color: #ffffff;
      width: 100%;
      height: 4rem;
      font-size: 0.6rem;
      .send{
         cursor: pointer;
         border-radius: 5px;
         bottom: 5%;
         z-index: 2;
         right: 3%;
         box-sizing: content-box;
         color: #ffffff;
         background-color: skyblue;
         font-size: 0.5rem;
         padding: 3px 6px;
         line-height: 0.5rem;
         text-align: center;
         position: absolute;
       }
       .send:hover{
         background-color: rgb(63, 163, 230);
       }
     .input-icon{
       margin-left: 10px;
       color: #666666;
       .iconfont{
         margin-right: 8px;
         font-size: 0.8rem;
       }
     }
       #chatTextarea::-webkit-scrollbar {
        /*滚动条整体样式*/
        width : 10px;  /*高宽分别对应横竖滚动条的尺寸*/
        height: 1px;
        }
       #chatTextarea::-webkit-scrollbar-thumb {
      /*滚动条里面小方块*/
      border-radius   : 10px;
      background-color: skyblue;
      background-image: -webkit-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.2) 25%,
      transparent 25%,
      transparent 50%,
      rgba(255, 255, 255, 0.2) 50%,
      rgba(255, 255, 255, 0.2) 75%,
      transparent 75%,
      transparent
      );
      }
      #chatTextarea::-webkit-scrollbar-track {
      /*滚动条里面轨道*/
      box-shadow   : inset 0 0 5px rgba(0, 0, 0, 0.2);
      background   : #ededed;
      border-radius: 10px;
      } 
     #chatTextarea{
       position: relative;
       border: 0px;
       overflow-y: scroll;
       resize: none;
       width: 100%;
       height: 3rem;
       outline:none;
       padding-top: 8px;
       padding-left: 10px;
     }
    }
  }
}
</style>