js给网页添加文字水印
js给网页添加文字水印。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Watermark Example</title>
<style>
body {
position: relative;
z-index: 1;
}
#watermark {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
pointer-events: none;
z-index: 9999;
}
</style>
</head>
<body>
<div id="watermark"></div>
<script>
function addWatermark(text) {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
// 设置 Canvas 大小
canvas.width = 300;
canvas.height = 200;
// 设置字体样式
ctx.font = "20px Arial";
ctx.fillStyle = "rgba(200, 200, 200, 0.3)";
ctx.textAlign = "center";
ctx.textBaseline = "middle";
// 设置旋转角度
ctx.rotate(-20 * Math.PI / 180);
ctx.fillText(text, canvas.width / 2, canvas.height / 2);
// 将 Canvas 作为背景图片
document.getElementById('watermark').style.backgroundImage = `url(${canvas.toDataURL("image/png")})`;
document.getElementById('watermark').style.backgroundRepeat = "repeat";
}
// 添加水印文本
addWatermark("Watermark Text");
</script>
</body>
</html>
转载请注明出处：php程序员的笔记
最后修改时间：2024年09月16日 08时13分 文章来源：yuhaomiao