鼠标悬停效果和离开效果
js 用 onmouseenter onmouseleave
<h1 id="demo" onmouseenter="mouseEnter()" onmouseleave="mouseLeave()">鼠标移到我这</h1>
vue用 v-on:mouseenter v-on:mouseleave 或 @mouseenter @mouseleave
<div id="app"> <input v-model="message"/> <p>{{ message }}</p> <button v-on:mouseenter="show" v-on:mouseleave="leave">点我</button> </div>
原文：https://www.cnblogs.com/jiangfeilong/p/11222767.html