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一键复制微信，并打开微信代码

<style>
.mb-3, .my-3 {
    margin-bottom: 1rem !important;
}


.justify-content-center {
    justify-content: center !important;
}
.flex-wrap {
    flex-wrap: wrap !important;
}
.pagination {
    display: flex;
    padding-left: 0;
    list-style: none;
    border-radius: 0.25rem;
}

li {
    display: list-item;
    text-align: -webkit-match-parent;
}

.page-link:not(:disabled):not(.disabled) {
    cursor: pointer;
}
.page-link {
    position: relative;
    display: block;
    padding: 0.5rem 0.75rem;
    margin-left: -1px;
    line-height: 1.25;
    color: #858585;
    background-color: #fff;
    border: 0px solid #fff;
}

.page-item.active .page-link {
    z-index: 1;
    color: #000;
    background-color: #fff;
    border-color: #fff;
}

.page-link:not(:disabled):not(.disabled) {
    cursor: pointer;
}

.xtgl {
   text-align: center;
   font-weight:500;
   font-size:16px;
}

sect a {
    text-decoration: none;
    border: 0;
    color: #000;
    box-sizing: border-box;
}
</style>
<style>
    a:link{text-decoration:none;}/* 指正常的未被访问过的链接*/
    a:visited{text-decoration:none;}/*指已经访问过的链接*/
    a:hover{text-decoration:none;}/*指鼠标在链接*/
    a:active{text-decoration:none;}/* 指正在点的链接*/
    .wx{
        width: 50%;
        margin-left: 5%;
        font-size: 18px;
        color:white;
        text-align: center;
        background-color: #0066CC;
        border-radius: 10px;
        line-height: 40px;
    }
    .wx a{
        font-size: 18px;
        color:white;
    }
    /*弹窗*/
    .tan{
        width:80%;
        height:180px;
        background-color:#e8e8e8;
        position:fixed;
        left:10%;
        top:40%;
        display:none;
        z-index: 200;
    }
    .kuang{
        height:120px;
        text-align:center;
        padding: 20px 0;
    }
    .txtcss{
        color:red;
        font-weight:800;
        font-size:20px;
    }
    .copy{
        font-size: 16px;
        float: left;
        background-color: #5AD700;
        padding: 5px 20px;
        margin-left: 25%;color: black;
        border-radius: 5px;
    }
    .copy a{color: white;}
    .guanbi{
        width:20px;
        height:20px;
        color:red;
        margin-top:-130px;
    }
</style>

第一种：点击后直接复制并跳转微信界面
<div class="row">
     <div class="wx" onclick="copywx()">
         <a href="weixin://"><span id="copy_content">188xxxxx888</span>（微信同号）,复制跳转微信</a>
     </div>
</div>

第二种：点击后出现弹框，复制并跳转微信界面
<div class="row">
    <div class="wx" onclick="showwx()">添加微信了解更多</div>
</div>

    <!--弹窗-->
    <div id='myshow' class="tan">
        <div class="kuang">
            咨询学费<br/>
            了解更多<br/>
            请添加微信:<br/>
            <span id="copy_content" class="txtcss">188xxxxx888</span>
        </div>
        <div style="height: 10px;"></div>
        <p onclick="copywx()" class="copy"><a href="weixin://">复制并跳转微信</a></p>
        <div onclick="closeshow()" class="closeshow pull-right guanbi">x</div>
    </div>


<script>
    /*点击复制微信号*/
    function copywx(){
        const range = document.createRange();
        range.selectNode(document.getElementById('copy_content'));
        const selection = window.getSelection();
        if(selection.rangeCount > 0) selection.removeAllRanges();
        selection.addRange(range);
        document.execCommand('copy');
        alert("复制成功！");
    }
    /*点击出现弹框*/
    function showwx(){
        var ss=document.getElementById('myshow');
        ss.style.display='block';
    }
    /*关闭弹窗*/
    function closeshow(){
        var ss=document.getElementById('myshow');
        ss.style.display='none';
    }
</script>

 <br>

  <div class="row">
     <div class="wx">
 <img src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1576133198295&di=c0e71f81f077018ee895a2c740644bd9&imgtype=0&src=http%3A%2F%2Fi1.bangqu.com%2Fr2%2Fnews%2F20171001%2F30484f614a533477436f.jpg" />
     </div>
</div>