vue实现页面添加水印

本文实例为大家分享了vue实现页面添加水印的具体代码，供大家参考，具体内容如下

js文件

建一个watermark.js文件

let setWatermark = (str1, str2, str3) => {
let id = '1.23452384164.123412415'
? ? if (document.getElementById(id) !== null) {
? ? ? ? document.body.removeChild(document.getElementById(id))
? ? }
? ? let can = document.createElement('canvas')
? ? can.width = 270
? ? can.height = 100
? ? let cans = can.getContext('2d')
? ? cans.rotate(-20 * Math.PI / 180)
? ? cans.font = '17px Vedana'
? ? cans.fillStyle = '#666666'
? ? cans.textAlign = 'center'
? ? cans.textBaseline = 'Middle'
? ? cans.fillText(str1, can.width / 2, can.height)
? ? cans.fillText(str2, can.width / 2, can.height + 20)
? ? cans.fillText(str3, can.width / 2, can.height + 40)
? ? let div = document.createElement('div')
? ? div.id = id
? ? div.style.pointerEvents = 'none'
? ? div.style.top = '20px'
? ? div.style.left = '0px'
? ? div.style.opacity = '0.15'
? ? div.style.position = 'fixed'
? ? 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
}
// 添加水印
export const setWaterMark = (str1, str2, str3) => {
? ? let id = setWatermark(str1, str2, str3)
? ? if (document.getElementById(id) === null) {
? ? ? ? id = setWatermark(str1, str2, str3)
? ? }
}
// 移除水印
export const removeWatermark = () => {
? ? let id = '1.23452384164.123412415'
? ? if (document.getElementById(id) !== null) {
? ? ? ? document.body.removeChild(document.getElementById(id))
? ? }
}

页面引入

html添加

:style="{ backgroundImage: `url(${orgBackground})` }"

引入

import { removeWatermark, setWaterMark } from '@/libs/watermark'

data添加

orgBackground: '',

mounted()添加

setWaterMark(str1, str2, str3);

效果

来源：https://blog.csdn.net/qq_40518071/article/details/125448677