作者：蛙哇

原文链接： https://segmentfault.com/a/1190000022055867

来源：segmentfault

前言

项目生成公司水印是很普遍的需求，下面是vue项目生产水印的方法。话不多说，复制粘贴就可以马上解决你的需求。

步骤1

创建watermark.js文件。目录结构

/**  水印添加方法  */let setWatermark = (str1, str2) => {let id = '1.23452384164.123412415'if (document.getElementById(id) !== null) {document.body.removeChild(document.getElementById(id))}let can = document.createElement('canvas')// 设置canvas画布大小can.width = 150can.height = 80let cans = can.getContext('2d')cans.rotate(-20 * Math.PI / 180) // 水印旋转角度cans.font = '15px Vedana'cans.fillStyle = '#666666'cans.textAlign = 'center'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)let div = document.createElement('div')div.id = iddiv.style.pointerEvents = 'none'div.style.top = '40px'div.style.left = '0px'div.style.opacity = '0.15'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
}// 添加水印方法
export const setWaterMark = (str1, str2) => {let id = setWatermark(str1, str2)if (document.getElementById(id) === null) {id = setWatermark(str1, str2)}
}// 移除水印方法
export const removeWatermark = () => {let id = '1.23452384164.123412415'if (document.getElementById(id) !== null) {document.body.removeChild(document.getElementById(id))}
}

步骤2

vue中直接引用、使用。

import { removeWatermark, setWaterMark } from '@/common/watermark'
mounted() {setWaterMark('liergou', '李二狗');
},
destroyed() {removeWatermark();
},

效果图：