vue添加水印

创建watermark.js文件

let watermark = {}
let setWatermark = (str) => {
  let id = '1.23452384164.123412415'
  if (document.getElementById(id) !== null) {
    document.body.removeChild(document.getElementById(id))
  }
  let can = document.createElement('canvas')
  can.width = 150
  can.height = 120
  let cans = can.getContext('2d')
  cans.rotate(-20 * Math.PI / 180)
  cans.font = '20px Vedana'
  cans.fillStyle = 'rgba(200, 200, 200, 0.20)'
  cans.textAlign = 'left'
  cans.textBaseline = 'Middle'
  cans.fillText(str, can.width / 3, can.height / 2)
  let div = document.createElement('div')
  div.id = id
  div.style.pointerEvents = 'none'
  div.style.top = '0px'
  div.style.left = '0px'
  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 = (str) => {
  let id = setWatermark(str)
  setInterval(() => {
    if (document.getElementById(id) === null) {
      id = setWatermark(str)
    }
  }, 500)
  window.onresize = () => {
    setWatermark(str)
  }
}

export default watermark

在app.vue中mounted方法内调用该方法即可全局添加如个别页面需要单独添加可在单个文件的mounted生命周期里调用方法

mounted: function () {
    Watermark.set("水印内容")
}

转发原链接： Vue项目在页面添加水印功能_Mazhitaoooo-优快云博客_vue 添加水印