【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')

原文链接：https://blog.csdn.net/qq_47002028/article/details/125976072