js mouse results

Mouse-over effects and the effect of leaving

js with onmouseenter onmouseleave

<h1 the above mentioned id = " Demo " OnMouseEnter = " mouseEnter () " OnMouseLeave = " mouseLeave () " > mouse over my </ 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>