如何用vue实现网页截图你知道吗

npm install html2canvas --save

import html2canvas from "html2canvas";

<el-button class="button-dalod" size="mini" title="生成图片" @click="toImage()" icon="el-icon-download"></el-button>

// 页面元素转图片        toImage () {            // 手动创建一个 canvas 标签            const canvas = document.createElement("canvas")            // 获取父标签，意思是这个标签内的 DOM 元素生成图片            // imageTofile是给截图范围内的父级元素自定义的ref名称            let canvasBox = this.$refs.imageTofile            // 获取父级的宽高            const width = parseInt(window.getComputedStyle(canvasBox).width)            const height = parseInt(window.getComputedStyle(canvasBox).height)            // 宽高 * 2 并放大 2 倍 是为了防止图片模糊            canvas.width = width * 2            canvas.height = height * 2            canvas.style.width = width + 'px'            canvas.style.height = height + 'px'            const context = canvas.getContext("2d");            context.scale(2, 2);            const options = {                backgroundColor: null,                canvas: canvas,                useCORS: true            }            html2canvas(canvasBox, options).then((canvas) => {                // toDataURL 图片格式转成 base64                let dataURL = canvas.toDataURL("image/png")                console.log(dataURL)                this.downloadImage(dataURL)            })        },        //下载图片        downloadImage(url) {            // 如果是在网页中可以直接创建一个 a 标签直接下载             let a = document.createElement('a')            a.href = url            a.download = '首页截图'            a.click()        },