html遮罩实例,给原生html中添加水印遮罩层的实现示例

效果图

代码

水印遮罩

.watermark_mask {

position: fixed;

top: 10px;

}

.hello {

width: 500px;

height: 2048px;

margin: 0 auto;

background-color: pink;

}

Hello World

Hello World 2

Hello World 3

const watermarkId = "watermarkId";

// 水印遮罩函数

function watermarkUtils(settings, id) {

//默认设置

var defaultSettings={

watermark_txt: "text",

watermark_x: 10,//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: 55,//水印行数

watermark_cols: 55,//水印列数

watermark_x_space: 10,//水印x轴间隔

watermark_y_space: 10,//水印y轴间隔

watermark_color: '#000000',//水印字体颜色

watermark_alpha: 0.2,//水印透明度

watermark_fontsize: '15px',//水印字体大小

watermark_font: '微软雅黑',//水印字体

watermark_width: 50,//水印宽度

watermark_height: 20,//水印长度

watermark_angle: 25//水印倾斜度数

};

//采用配置项替换默认值，作用类似jquery.extend

if(typeof settings === "object") {

var src = settings;

for(let key in src) {

if(src[key] && defaultSettings[key] && src[key] === defaultSettings[key])

continue;

else if(src[key])

defaultSettings[key]=src[key];

}

var oTemp = document.createDocumentFragment();

// var oTemp = document.createElement("div");

//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);

//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');

mask_div.id = 'mask_div' + i + j;

mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));

//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.pointerEvents = "none";

//mask_div.style.border="solid #eee 1px";

mask_div.style.opacity = defaultSettings.watermark_alpha;

mask_div.style.fontSize = defaultSettings.watermark_fontsize;

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";

oTemp.appendChild(mask_div);

};

// document.body.appendChild(oTemp);

try {

// console.log(document.getElementById(id), "document.getElementById(id)");

document.getElementById(id).appendChild(oTemp);

} catch(error) {

console.error(error, "遮罩异常");

}

};

watermarkUtils({ watermark_txt: "9527", watermark_width: 60, watermark_fontsize: "14px" }, watermarkId);

核心代码