elementui使用el-switch改变active-color组件不响应更新

 <el-switch v-model="layoutSetting.optional"
                           class="trade-switch"
                           ref="optionalRef"
                           @change="changeHandler($event,'optional')"
                           :active-color="layoutThemeSwitch"
                           :inactive-color="layoutThemeSwitch">
                </el-switch>

如上图代码：当改变layoutThemeSwitch,视图不响应更新

this.$nextTick或者this.$forceUpdate()或者this.$set试下