html2canvas的使用：vue中将div导出成图片

1.npm i html2canvas --save

2.导出

　　div内的图片需要是本地的，线上图片需要转化为base64

<script>
import html2canvas from 'html2canvas'
export default {
    methods: {
        //截屏
        handleOk() {
            html2canvas(this.$refs.screen, {
                useCORS: true,
            }).then((canvas) => {
                if (navigator.msSaveBlob) {
                    // IE10+
                    let blob = canvas.msToBlob()
                    return navigator.msSaveBlob(blob, name)
                } else {
                    let imageurl = canvas.toDataURL('image/png')
                    //这里需要自己选择命名规则
                    let imagename = ''
                    this.fileDownload(imageurl, imagename)
                }
            })
        },
        //下载截屏图片
        fileDownload(downloadUrl, downloadName) {
            let aLink = document.createElement('a')
            aLink.style.display = 'none'
            aLink.href = downloadUrl
            aLink.download = `${downloadName}.jpg`
            // 触发点击-然后移除
            document.body.appendChild(aLink)
            aLink.click()
            document.body.removeChild(aLink)
        },
    },
}
</script>