如果孩子有类,如何设置父div的样式? 我尝试使用$refs计算,但$refs。[类] 始终未定义
例
<div
:style="isChildHasClass"
class="container">
<div class="child example"></div>
</div>
如何用类"容器"来设置div块的样式,只有当子块有类"示例"时?
试试这个:
new Vue({
el: "#app",
data: {
isExample: true,
},
created() {
setInterval(() => {
this.isExample = !this.isExample
}, 2000)
},
computed: {
parentClasses() {
return ['parent', this.isExample ? 'container' : null];
},
childClasses() {
return ['child', this.isExample ? 'example' : null]
}
}
})
.container {
background: tomato;
color: white;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.16/vue.min.js"></script>
<div id="app">
<div :class="parentClasses">
parentClasses: {{parentClasses}}
<div :class="childClasses">childClasses: {{childClasses}}</div>
</div>
</div>