【无标题】原生html添加水印与vue添加水印

原生html添加：

1、创建js文件

2、js:

function watermark(settings) {
//默认设置
var defaultSettings={
watermark_txt:"text",
watermark_x:20,//水印起始位置x轴坐标
watermark_y:100,//水印起始位置Y轴坐标
watermark_rows:6,//水印行数
watermark_cols:10,//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:'#000',//水印字体颜色
watermark_alpha:0.1,//水印透明度
watermark_fontsize:'16px',//水印字体大小
watermark_font:'微软雅黑',//水印字体
watermark_width:210,//水印宽度
watermark_height:80,//水印长度
watermark_angle:15//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(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;
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.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);
};
};
document.body.appendChild(oTemp);
}

html:

var cout = Math.round(document.body.scrollHeight / 140);
watermark({
watermark_txt: '水印文本',
watermark_rows: cout,
})

vue添加：

1、在utils新建js文件

2.引入

import warterMark from '@/utils/watermark'

 js代码：

const watermark = {}
const setWatermark = (str1, str2,str3) => {
const id = '1.23452384164.123412415'
if (document.getElementById(id) !== null) {
document.body.removeChild(document.getElementById(id))
}
const can = document.createElement('canvas')
can.width = 400
can.height = 150
const cans = can.getContext('2d')
cans.rotate(-18 * Math.PI / 200)
cans.font = '16px Vedana'
cans.fillStyle = '#000'
cans.textAlign = 'left'
cans.textBaseline = 'Middle'
cans.fillText(str1, can.width / 2, can.height) // 水印在画布的位置x，y轴
cans.fillText(str2, can.width / 2, can.height + 22)
cans.fillText(str3, can.width / 2, can.height + 44)
const div = document.createElement('div')
div.id = id
div.style.pointerEvents = 'none'
div.style.top = '0'
div.style.left = '0'
div.style.opacity = '0.4'
div.style.position = 'fixed'
div.style.zIndex = '100000'
div.style.width = document.documentElement.clientWidth + 'px'
div.style.height = document.documentElement.clientHeight
+ 'px'
div.style.background = 'url(' + can.toDataURL('image/png') + ') left top repeat'
document.body.appendChild(div)
return id
}
// 该方法只允许调用一次
watermark.set = (str1, str2,str3) => {
let id = setWatermark(str1, str2,str3)
setInterval(() => {
if (document.getElementById(id) === null) {
id = setWatermark(str1, str2,str3)
}
}, 500)
window.onresize = () => {
setWatermark(str1, str2,str3)
}
}
export default watermark

vue文件代码：

warterMark.set('2022-8', 'sysadmin','admin')

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