给原生html中添加水印遮罩层的实现示例

效果图

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>
    水印遮罩/title>
    /head>
    style>
    .watermark_mask {
            position: fixed;
            top: 10px;
    }
    .hello {
            width: 500px;
            height: 2048px;
            margin: 0 auto;
            background-color: pink;
    }
    /style>
    body>
        div class="hello">
            Hello World        div style="margin-top: 600px;
    ">
    Hello World 2/div>
            div style="margin-top: 1200px;
    ">
    Hello World 3/div>
        /div>
        div id="watermarkId" class="watermark_mask">
    /div>
        script>
            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);
        /script>
    /body>
    /html>
    

核心代码

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

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