vue 实现图片预览功能并显示在弹窗的最上方

1. 在 components 下新建一个文件夹 ImagePreview

• 使用 preview-teleported 来实现图片穿透功能 让预览的图片显示在最上方

代码如下：

<template>
  <el-image
    :src="`${realSrc}`"
    fit="cover"
    :style="`width:${realWidth};height:${realHeight};`"
    :preview-src-list="realSrcList"
    preview-teleported
  >
    <template #error>
      <div class="image-slot">
        <el-icon><picture-filled /></el-icon>
      </div>
    </template>
  </el-image>
</template>

<script setup>
import { isExternal } from "@/utils/validate";

const props = defineProps({
  src: {
    type: String,
    default: ""
  },
  width: {
    type: [Number, String],
    default: ""
  },
  height: {
    type: [Number, String],
    default: ""
  }
});

const realSrc = computed(() => {
  if (!props.src) {
    return;
  }
  let real_src = props.src.split(",")[0];
  if (isExternal(real_src)) {
    return real_src;
  }
  return import.meta.env.VITE_APP_BASE_API + real_src;
});

const realSrcList = computed(() => {
  if (!props.src) {
    return;
  }
  let real_src_list = props.src.split(",");
  let srcList = [];
  real_src_list.forEach(item => {
    if (isExternal(item)) {
      return srcList.push(item);
    }
    return srcList.push(import.meta.env.VITE_APP_BASE_API + item);
  });
  return srcList;
});

const realWidth = computed(() =>
  typeof props.width == "string" ? props.width : `${props.width}px`
);

const realHeight = computed(() =>
  typeof props.height == "string" ? props.height : `${props.height}px`
);
</script>

<style lang="scss" scoped>
.el-image {
  border-radius: 5px;
  background-color: #ebeef5;
  box-shadow: 0 0 5px 1px #ccc;
  :deep(.el-image__inner) {
    transition: all 0.3s;
    cursor: pointer;
    &:hover {
      transform: scale(1.2);
    }
  }
  :deep(.image-slot) {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    color: #909399;
    font-size: 30px;
  }
}
</style>

2. 在 main.js 内注册组件

import ImagePreview from "@/components/ImagePreview"
// 全局组件挂载
app.component('ImagePreview', ImagePreview)

3. 在页面使用

<image-preview :src="images" style="height: 60px;width:60px;" />