canvas 截图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>截图</title>
<style>
</style>
<script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="http://html2canvas.hertzen.com/dist/html2canvas.min.js"></script>
</head>
<body>
<!-- <canvas id="myCanvas" width="200" height="100" style="border:1px solid #000000;">
</canvas> -->
<div id="aa">
sdfsdfsdfsdf
</div>
<div>
<img src="" alt="" srcset="" id='img'>
</div>
</body>
<script>
$(function () {
html2canvas(document.getElementById("aa"), {
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: '#39a',//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");
console.log(imgUri)
document.getElementById("img").src = imgUri
});
})
</script>
</html>
