template部分

<el-buttontype="primary"size="small"@click="handlePreview(scope.$index, scope.row)">预览</el-button
>
<!-- 图片预览 -->
<el-image-viewerv-if="showImagePreview":zoom-rate="1.2"@close="closePreview":url-list="imgPreviewList"
/>

const imgPreviewList = ref<any>([])
const showImagePreview = ref(false)
const currentBase64FileData = reactive({base64: '',name: ''
})const handlePreview = async (index: number, row: any) => {let res = await handleDownload(index, row, true,)currentBase64FileData.base64 = 'data:image/png;base64,' + res?.base64currentBase64FileData.name = res?.nameshowImagePreview.value = true// 下面数组里可以放一个url，如'https://raw.githubusercontent.com/JACK-ZHANG-coming/map-depot/master/2023image-20231120091054028.png'，我这里放的是一个base64数据，也可以用来显示图片imgPreviewList.value = [currentBase64FileData.base64]
}const closePreview = () => {imgPreviewList.value = []showImagePreview.value = false
}

 ok，经过上面简单几句代码，就实现了“点击按钮直接显示图片的预览形式”啦 ~