1、代码插件
(function(watermark) {
window.watermarkdivs = [];
// 加载水印
var loadMark = function(settings) {
var defaultSettings = {
watermark_txt: "text",
watermark_x: 20, //水印起始位置x轴坐标
watermark_y: 20, //水印起始位置Y轴坐标
watermark_rows: 0, //水印行数
watermark_cols: 0, //水印列数
watermark_x_space: 100, //水印x轴间隔
watermark_y_space: 50, //水印y轴间隔
watermark_color: '#000000', //水印字体颜色
watermark_alpha: 0.5, //水印透明度，要求设置在大于等于0.005
watermark_fontsize: '18px', //水印字体大小
watermark_font: '微软雅黑', //水印字体
watermark_width: 150, //水印宽度
watermark_height: 100, //水印长度
watermark_angle: 15, //水印倾斜度数
watermark_bg_alpha: 0.5 //加透明度导致隐形水印无法读取
};
//采用配置项替换默认值，作用类似jquery.extend
if (arguments.length === 1 && typeof arguments[0] === "object") {
var src = arguments[0] || {};
for (key in src) {
if (src[key] && defaultSettings[key] && src[key] === defaultSettings[key])
continue;
else if (src[key])
defaultSettings[key] = src[key];
}
}
if (window.watermarkdivs && window.watermarkdivs.length > 0) {
document.body.removeChild(document.getElementById("otdivid"));
window.watermarkdivs = [];
}
//获取页面最大宽度
var page_width = Math.max(document.body.scrollWidth, document.body.clientWidth);
//获取页面最大长度
var page_height = Math.max(document.body.scrollHeight, document.body.clientHeight);
// 创建文档碎片
var oTemp = document.createDocumentFragment();
//创建水印外壳div
var otdiv = document.getElementById("otdivid");
if (!otdiv) {
otdiv = document.createElement('div');
otdiv.id = "otdivid";
otdiv.style.pointerEvents = "none";
document.body.appendChild(otdiv);
}
//如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔
if (defaultSettings.watermark_cols == 0 || (parseInt(defaultSettings.watermark_x + defaultSettings.watermark_width * defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1)) > page_width)) {
defaultSettings.watermark_cols = parseInt((page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space));
defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1));
}
//如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔
if (defaultSettings.watermark_rows == 0 || (parseInt(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height)) {
defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space));
defaultSettings.watermark_y_space = parseInt(((page_height - defaultSettings.watermark_y) - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1));
}
var x;
var y;
for (var i = 0; i < defaultSettings.watermark_rows; i++) {
y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
for (var j = 0; j < defaultSettings.watermark_cols; j++) {
x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;
var mask_div = document.createElement('div');
var oText = document.createTextNode(defaultSettings.watermark_txt);
mask_div.appendChild(oText);
// 设置一张水印相关属性start
mask_div.id = 'mask_div' + i + j;
//设置水印div倾斜显示
mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.visibility = "";
mask_div.style.position = "absolute";
//选不中
mask_div.style.left = x + 'px';
mask_div.style.top = y + 'px';
mask_div.style.overflow = "hidden";
mask_div.style.zIndex = "9999";
//mask_div.style.border="solid #eee 1px";
mask_div.style.opacity = defaultSettings.watermark_alpha;
mask_div.style.fontSize = defaultSettings.watermark_fontsize;
mask_div.style.fontFamily = defaultSettings.watermark_font;
mask_div.style.color = defaultSettings.watermark_color;
mask_div.style.textAlign = "center";
mask_div.style.width = defaultSettings.watermark_width + 'px';
mask_div.style.height = defaultSettings.watermark_height + 'px';
mask_div.style.display = "block";
//设置一张水印相关属性end
//附加到文档碎片中
otdiv.appendChild(mask_div);
window.watermarkdivs.push(otdiv); //控制页面大小变化时水印字体
};
};
//一次性添加到document中
document.body.appendChild(oTemp);
};
watermark.load = function(settings) {
window.onload = function() {
loadMark(settings);
};
window.onresize = function() {
loadMark(settings);
};
};
})(window.watermark = {});
2、代码引入
watermark.load({ watermark_txt: "我是水印，我来自https://ipkd.cn/" });
上面是“js实现图片、文字水印效果”的全面内容，想了解更多关于 js 内容，请继续关注web建站教程。
当前网址：https://m.ipkd.cn/webs_2108.html
声明：本站提供的所有资源部分来自互联网，如果有侵犯您的版权或其他权益，请发送到邮箱：admin@ipkd.cn，我们会在看到邮件的第一时间内为您处理！
