src/components/cascader/casitem.vue

<template>
    <li :class="classes">{{ data.label }}<i v-if="data.children && data.children.length" class="ivu-icon ivu-icon-ios-arrow-right"></i></li>
</template>
<script>
    export default {
        props: {
            data: Object,
            prefixCls: String,
            tmpItem: Object
        },
        computed: {
            classes () {
                return [
                    `${this.prefixCls}-menu-item`,
                    {
                        [`${this.prefixCls}-menu-item-active`]: this.tmpItem.value === this.data.value,
                        [`${this.prefixCls}-menu-item-disabled`]: this.data.disabled
                    }
                ]
            }
        }
    }
</script>