回答-BFW问答

可以使用html2canvas
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>BFWONE.JS DEMO PAGE</title>
    <script id="bfwone" data="dep=jquery.17&err=0" src="http://repo.bfw.wiki/bfwrepo/js/bfwone.js"></script>

</head>
<body>
    <div id="capture" style="background: #f5da55;transform:scale(1)">

        <img src="http://repo.bfw.wiki/bfwrepo/image/5d653be845a41.png?x-oss-process=image/auto-orient,1/resize,m_fill,w_100,h_100,/quality,q_90" />
        <h4 style="color: #000; ">Hello world!</h4>
    </div>
    <script>
        bready(function() {
            use(["html2canvas.min"], function() {
                html2canvas(document.querySelector("#capture"), {
                    useCORS: true,
                    backgroundColor: null
                }).then(canvas => {
                    document.body.appendChild(canvas)
                });
            });
        });
    </script>
</body>
</html>