前端页面添加水印

341 阅读1分钟

vue项目,页面添加水印

添加水印的方法封装成js文件,直接在项目中导入使用即可,话不多说,上源码

function watermark(settings) {
	//默认设置
	var defaultSettings={
		watermark_txt: settings.watermark_txt,
		watermark_x:24,//水印起始位置x轴坐标
		watermark_y:36,//水印起始位置Y轴坐标
		watermark_rows:100,//水印行数
		watermark_cols:50,//水印列数
		watermark_x_space:20,//水印x轴间隔
		watermark_y_space:40,//水印y轴间隔
		watermark_color:'#aaa',//水印字体颜色
		watermark_alpha:0.3,//水印透明度
		watermark_fontsize:'18px',//水印字体大小
		watermark_font:'微软雅黑',//水印字体
		watermark_width:160,//水印宽度
		watermark_height:100,//水印长度
		watermark_angle:18//水印倾斜度数
	};
	//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(var 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();
	
	//获取页面最大宽度
	var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth);
	var cutWidth = page_width*0.0150;
	var page_width=page_width-cutWidth;
	//获取页面最大高度
	var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight)+450;
	// var page_height = document.body.scrollHeight+document.body.scrollTop;
	//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;
	var today = new Date();
	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.className = 'mask_div';
			// mask_div.innerHTML = defaultSettings.watermark_txt + '<br/>' + today.getFullYear() + '-' + (today.getMonth()+1) + '-' + today.getDate() ;
			mask_div.innerHTML = defaultSettings.watermark_txt;
			// 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";
			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';//pointer-events:none  让水印不遮挡页面的点击事件
			//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";
			oTemp.appendChild(mask_div);
		};
	};
	var boxs = document.getElementsByClassName("mask_div");
	for (;boxs.length;) {
		var box = boxs[0];
		box.parentNode.removeChild(box);
	}
	document.body.appendChild(oTemp);
}

function removeWatermark() {
	var boxs = document.getElementsByClassName("mask_div");
	for (;boxs.length;) {
		var box = boxs[0];
		box.parentNode.removeChild(box);
	}
}
export {
	watermark,
	removeWatermark
}

可根据要求自行设计水印大小密度内容等

image.png

image.png