<div v-for="(item,index) in data" :key='index'>
<span ref="title1"
onmouseover="this.getElementsByClassName('hoverStyle')[0].style.color='#497FE0'"
onmouseleave="this.getElementsByClassName('hoverStyle')[0].style.color='#000000'"
>
<span class="hoverStyle">{{item.title}}</span>
</span>
</div>
这里通过onmouserover 获取所在子层级的dom.然后设置它的颜色
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