js 鼠标效果

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>