vue3使用useMouseInElement实现图片局部放大预览效果

<template>
  <div v-if="isVisible" ref="imageContainer" class="image-container">
    <!-- 图片局部放大的容器 -->
    <div
      v-show="isZoomed"
      :style="zoomedStyle"
      class="zoomed-image"
      @mousemove="updateZoomedPosition"
      @mouseleave="hideZoomedImage"
    >
      <!-- 放大后的图片 -->
      <img :src="src" :style="zoomedImageStyle" alt="Zoomed Image" />
    </div>
    <!-- 普通显示的图片 -->
    <img
      :src="src"
      :style="imageStyle"
      @mousemove="handleMousemove"
      @mouseenter="showZoomedImage"
      alt="Normal Image"
    />
  </div>
</template>
 
<script setup>
import { ref, onMounted, onBeforeUnmount } from 'vue';
import { useMouseInElement } from '../composables/useMouseInElement';
 
const props = defineProps({
  src: String,
  zoom: {
    type: Number,
    default: 3,
  },
});
 
const imageContainer = ref(null);
const isVisible = ref(true);
const isZoomed = ref(false);
const zoomedPosition = ref({ x: 0, y: 0 });
 
// 计算放大后图片的样式
const zoomedImageStyle = {
  width: `${props.zoom}rem`,
  height: 'auto',
  position: 'absolute',
  transform: `translate(${zoomedPosition.value.x}px, ${zoomedPosition.value.y}px)`,
};
 
// 计算放大图片容器的样式
const zoomedStyle = {
  position: 'absolute',
  cursor: 'zoom-in',
};
 
// 计算普通图片的样式
const imageStyle = {
  width: '100%',
  height: 'auto',
  position: 'relative',
  cursor: 'zoom-in',
};
 
// 显示放大图片
const showZoomedImage = () => {
  isZoomed.value = true;
};
 
// 隐藏放大图片
const hideZoomedImage = () => {
  isZoomed.value = false;
};
 
// 更新放大图片的位置
const updateZoomedPosition = (event) => {
  const { width, height } = imageContainer.value.getBoundingClientRect();
  const relativeX = event.clientX - imageContainer.value.getBoundingClientRect().left;
  const relativeY = event.clientY - imageContainer.value.getBoundingClientRect().top;
  zoomedPosition.value = {
    x: relativeX - width / (2 * props.zoom),
    y: relativeY - height / (2 * props.zoom),
  };
};
 
// 处理鼠标移动事件
const { handleMousemove } = useMouseInElement(imageContainer);
 
// 组件卸载前清理事件监听
onBeforeUnmount(() => {
  handleMousemove.cleanup();
});
</script>
 
<style scoped>
.image-container {
  position: relative;
  width: 300px;
  height: 200px;
  overflow: hidden;
}
 
.zoomed-image {
  overflow: hidden;
}
 
img {
  user-select: n