# 飞书一键复制网页内容为图片原理
飞书上有一键复制 dom 为图片的功能，原理是利用 canvas 将 dom 转换为图片，然后使用
navigator.clipboard到剪切板
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<button onclick="copyDivToImage()">复制</button>
<table border="1" id="table">
<tr>
<th>Month</th>
<th>Savings</th>
</tr>
<tr>
<td>January</td>
<td>$100</td>
</tr>
<tr>
<td>February</td>
<td>$80</td>
</tr>
</table>
<script src="https://unpkg.com/html2canvas@1.4.1/dist/html2canvas.js"></script>
<script>
function copyDivToImage() {
const element = document.getElementById("table");
html2canvas(element).then((canvas) => {
canvas.toBlob(
(blob) => {
// 复制文件到剪贴板
try {
navigator.clipboard.write([
// eslint-disable-next-line no-undef
new ClipboardItem({
[blob.type]: blob,
}),
]);
console.log("图像已成功复制到剪��板");
} catch (err) {
console.error("无法复制图像到剪贴板", err);
}
},
"image/png", // 文件的格式
1, // 图像压缩质量 0-1
);
});
}
</script>
</body>
</html>
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