组件

<el-cascader
    size="large"
    style="width:100%"
    :options="options"
    v-model="selectedOptions"
    placeholder="填写县/区名称可以自动搜索"
    filterable
    ref="cascader"
    @change="handleChange">
</el-cascader>

重置

resetPlace(){
    const _cascader = this.$refs.cascader
    if (_cascader) {
        _cascader.$refs.panel.checkedValue = []
        _cascader.$refs.panel.activePath = [] 
        _cascader.$refs.panel.syncActivePath()
    }
},