html2canvas:https://html2canvas.hertzen.com/configuration/
 github:https://github.com/niklasvh/html2canvas
效果
 

代码
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="./js/html2canvas.js"></script>
</head>
<body>
  <div id="root">
    <h3>名片</h3>
    <div class="person">
      <img src="./assets/header.png" alt="">
    </div>
  </div>
  <button id="downloadImg">点击</button>
</body>
<script>
  let dom = document.getElementById("downloadImg");
  dom.onclick = function () {
    // 实现保存为图片的第一步:html转为canvas
    html2canvas(document.getElementById("root"), {
      scale: window.devicePixelRatio,
      height: 800,
      width: 800,
      backgroundColor: null//设置背景透明
    }).then(function (canvas) {
      let link = document.createElement('a');
      // 实现保存图片的目标只需要将canvas转image即可。
      // canvas的toDataURL方法将canvas输出为data: URI类型的图片地址,再将该图片地址赋值给元素的src属性即可。
      link.href = canvas.toDataURL();
      // 保存图片
      link.setAttribute('download', '图片canvas.png');
      link.style.display = 'none';
      document.body.appendChild(link);
      link.click();
      document.removeChild(link)
    });
  }
</script>
</html>
当图片来源于服务器,需要设置跨域
<body>
  <div id="root">
    <h3>名片</h3>
    <div class="person">
      <img style="width: 600px; height: 400px;" src="https://img0.baidu.com/it/u=3976250177,3245140550&fm=253&fmt=auto&app=120&f=JPEG?w=1200&h=675" alt="">
    </div>
  </div>
  <button id="downloadImg">点击</button>
</body>
<script>
  let dom = document.getElementById("downloadImg");
  dom.onclick = function () {
    // 实现保存为图片的第一步:html转为canvas
    html2canvas(document.getElementById("root"), {
      useCORS: true,//图片设置跨域
      scale: window.devicePixelRatio,
      height: 800,
      width: 800,
      // backgroundColor: null
    }).then(function (canvas) {
      let link = document.createElement('a');
      // 实现保存图片的目标只需要将canvas转image即可。
      // canvas的toDataURL方法将canvas输出为data: URI类型的图片地址,再将该图片地址赋值给元素的src属性即可。
      link.href = canvas.toDataURL();
      // 保存图片
      link.setAttribute('download', '图片canvas.png');
      link.style.display = 'none';
      document.body.appendChild(link);
      link.click();
      document.removeChild(link)
    });
  }
</script>








![[oeasy]python0096_游戏娱乐行业_雅达利_米洛华_四人赛马_影视结合游戏](https://img-blog.csdnimg.cn/img_convert/73afe531d2b0c2da2264633bb1c89189.png)









