入门教程，后续有时间会慢慢更新，下面是一个简单demo实现拖拽功能

<template>
	<div>
	  <div ref="targetDom" id="div" @dragenter="dragenter">我是可放置目标</div>
	  <p id="drag" draggable="true"  @dragend="dragend">我是拖拽元素，把我拖拽到上面去</p>
	</div>
</template>

const targetDom = ref(null);

const dragover = (e) => {
  e.preventDefault();
  e.dataTransfer.dropEffect = 'move';
};

const dragend = (e) => {
  e.preventDefault();
  targetDom.value.appendChild(e.target);
};

#div {
  width: 300px;
  height: 80px;
  padding: 10px;
  border: 1px solid gray;
}