QRCode.js 生成二维码

$('#ewm_pic').qrcode({  
    render: 'canvas',  
    text: window.location.href,  
    height: 120,  
    width: 120,  
    typeNumber: -1,         //计算模式  
    correctLevel: QRErrorCorrectLevel.H,//纠错等级  
    background: "#ffffff",  //背景颜色  
    foreground: "#000000",  //前景颜色  
    //logo图片地址  
    src: "71.jpg"
}); 
if ($('#ewm_pic canvas').length>0) {
    $('#ewm_pic p').insertAfter("#ewm_pic canvas");
}

<div class="ewm_pic" id="ewm_pic">
    <!-- <img src="ewm_pic.png" data-bd-imgshare-binded="1"> -->
    <p>扫描查看更多内容</p>
</div>