option-group.vue
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<template>
<li :class="[prefixCls + '-wrap']" v-show="!hidden">
<div :class="[prefixCls + '-title']">{{ label }}</div>
<ul>
<li :class="[prefixCls]" ref="options"><slot></slot></li>
</ul>
</li>
</template>
<script>
const prefixCls = 'ivu-select-group';
export default {
name: 'OptionGroup',
props: {
label: {
type: String,
default: ''
}
},
data () {
return {
prefixCls: prefixCls,
hidden: false // for search
};
},
methods: {
queryChange () {
this.$nextTick(() => {
const options = this.$refs.options.querySelectorAll('.ivu-select-item');
let hasVisibleOption = false;
for (let i = 0; i < options.length; i++) {
if (options[i].style.display !== 'none') {
hasVisibleOption = true;
break;
}
}
this.hidden = !hasVisibleOption;
});
}
},
mounted () {
this.$on('on-query-change', () => {
this.queryChange();
return true;
});
}
};
</script>