vue添加水印

創建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
}
// 該方法只允許調用一次
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方法內調用該方法即可全局添加如個別頁面需要單獨添加可在單個文件的mounted生命周期里調用方法

mounted: function () {
    Watermark.set("水印內容")
}

 

轉發原鏈接： Vue項目在頁面添加水印功能_Mazhitaoooo-CSDN博客_vue 添加水印