npm install html2canvas

html2canvas(element，options).then((canvas) =>{})

canvas.toDataURL("image/png")

data-html2canvas-ignore="true"

<script src="js/html2canvas.min.js"></script>

import html2canvas from 'html2canvas';

<div class="capture">
    <img src="./wj.jpg" alt="">
    <div>
        <span style="color: #f00;letter-spacing: 20px">这是文字文字</span>
        <span data-html2canvas-ignore="true">不写入canvas</span>
    </div>
</div>

html2canvas(document.getElementsByClassName("capture")[0], {
        scale: 2,//缩放比例,默认为1
        allowTaint: false,//是否允许跨域图像污染画布
        useCORS: true,//是否尝试使用CORS从服务器加载图像
        width: '500',//画布的宽度
        height: '500',//画布的高度
        backgroundColor: '#000000',//画布的背景色，默认为透明
    }).then((canvas) => {
        //将canvas转为base64格式
        var imgUri = canvas.toDataURL("image/png");
    });
这里注意jQuery对象是do