vue 移动端vantUI将页面转成图片

<template>
    <div ref="canvasBox">
        测试
    </div>
</template>

import {ImagePreview} from '@vant/compat'

html2canvas(this.$refs['canvasBox'], {
    backgroundColor: null,
    useCORS: true,
}).then((canvas) => {
    let url = canvas.toDataURL("image/png");
    let tempList = [];

    tempList.push(url);

    ImagePreview({
      images: tempList,
      closeable: true,
      startPosition: 0
    })
});