#插件讨论# 【 下拉式筛选菜单 - 回梦無痕 】异步加载每个下拉数据

异步加载每个下拉数据，放入filterData老会报错，第二个会把第一个覆盖了，
控制台报错：
00:50:36.628 watch filterData at uni_modules/HM-filterDropdown/components/HM-filterDropdown/HM-filterDropdown.vue:184
00:50:36.677 watch filterData at uni_modules/HM-filterDropdown/components/HM-filterDropdown/HM-filterDropdown.vue:184
00:50:36.694 [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of undefined"

found in

---> <HMFilterDropdown> at uni_modules/HM-filterDropdown/components/HM-filterDropdown/HM-filterDropdown.vue
at pages/index/index.vue
00:50:36.727 [system]TypeError: Cannot read property 'length' of undefined