本文為博主原創，未經允許不得轉載：
異常展示：
[Vue warn]: Error in getter for watcher "filterAndSortData": "TypeError: Cannot read property 'length' of null" found in ---> <UxTable> <UxCol> <UxRow> <CustomerDomainCofigDetail> at src/web/manage/customerManage/CustomerDomainCofigDetail.vue <ElMain> <ElContainer> <MainAdmin> at src/web/manage/MainAdmin.vue <App> at src/app.vue <Root> warn @ vue.esm.js?efeb:591 logError @ vue.esm.js?efeb:1737 globalHandleError @ vue.esm.js?efeb:1732 handleError @ vue.esm.js?efeb:1721 get @ vue.esm.js?efeb:3145 run @ vue.esm.js?efeb:3219 flushSchedulerQueue @ vue.esm.js?efeb:2981 (anonymous) @ vue.esm.js?efeb:1837 flushCallbacks @ vue.esm.js?efeb:1758 Promise.then (async) microTimerFunc @ vue.esm.js?efeb:1806 nextTick @ vue.esm.js?efeb:1850 queueWatcher @ vue.esm.js?efeb:3068 update @ vue.esm.js?efeb:3209 notify @ vue.esm.js?efeb:697 reactiveSetter @ vue.esm.js?efeb:1014 proxySetter @ vue.esm.js?efeb:3300 (anonymous) @ CustomerDomainCofigDetail.vue?6300:488 Promise.then (async) initData @ CustomerDomainCofigDetail.vue?6300:482 created @ CustomerDomainCofigDetail.vue?6300:627 callHook @ vue.esm.js?efeb:2921 Vue._init @ vue.esm.js?efeb:4630 VueComponent @ vue.esm.js?efeb:4798 createComponentInstanceForVnode @ vue.esm.js?efeb:4310 init @ vue.esm.js?efeb:4131 createComponent @ vue.esm.js?efeb:5608 createElm @ vue.esm.js?efeb:5555 updateChildren @ vue.esm.js?efeb:5845 patchVnode @ vue.esm.js?efeb:5936 patch @ vue.esm.js?efeb:6096 Vue._update @ vue.esm.js?efeb:2670 updateComponent @ vue.esm.js?efeb:2788 get @ vue.esm.js?efeb:3142 run @ vue.esm.js?efeb:3219 flushSchedulerQueue @ vue.esm.js?efeb:2981 (anonymous) @ vue.esm.js?efeb:1837 flushCallbacks @ vue.esm.js?efeb:1758 vue.esm.js?efeb:1741 TypeError: Cannot read property 'length' of null at recursiveRows (utils.js?8c28:43) at normalizeRows (utils.js?8c28:61) at VueComponent.normalizeData (table.js?7ae6:141) at Watcher.get (vue.esm.js?efeb:3142) at Watcher.evaluate (vue.esm.js?efeb:3249) at VueComponent.computedGetter [as normalizeData] (vue.esm.js?efeb:3507) at VueComponent.filterAndSortData (table.js?7ae6:180) at Watcher.get (vue.esm.js?efeb:3142) at Watcher.evaluate (vue.esm.js?efeb:3249) at VueComponent.computedGetter [as filterAndSortData] (vue.esm.js?efeb:3507) logError @ vue.esm.js?efeb:1741 globalHandleError @ vue.esm.js?efeb:1732 handleError @ vue.esm.js?efeb:1721 get @ vue.esm.js?efeb:3145 run @ vue.esm.js?efeb:3219 flushSchedulerQueue @ vue.esm.js?efeb:2981 (anonymous) @ vue.esm.js?efeb:1837 flushCallbacks @ vue.esm.js?efeb:1758 Promise.then (async) microTimerFunc @ vue.esm.js?efeb:1806 nextTick @ vue.esm.js?efeb:1850 queueWatcher @ vue.esm.js?efeb:3068 update @ vue.esm.js?efeb:3209 notify @ vue.esm.js?efeb:697 reactiveSetter @ vue.esm.js?efeb:1014 proxySetter @ vue.esm.js?efeb:3300 (anonymous) @ CustomerDomainCofigDetail.vue?6300:488 Promise.then (async) initData @ CustomerDomainCofigDetail.vue?6300:482 created @ CustomerDomainCofigDetail.vue?6300:627 callHook @ vue.esm.js?efeb:2921 Vue._init @ vue.esm.js?efeb:4630 VueComponent @ vue.esm.js?efeb:4798 createComponentInstanceForVnode @ vue.esm.js?efeb:4310 init @ vue.esm.js?efeb:4131 createComponent @ vue.esm.js?efeb:5608 createElm @ vue.esm.js?efeb:5555 updateChildren @ vue.esm.js?efeb:5845 patchVnode @ vue.esm.js?efeb:5936 patch @ vue.esm.js?efeb:6096 Vue._update @ vue.esm.js?efeb:2670 updateComponent @ vue.esm.js?efeb:2788 get @ vue.esm.js?efeb:3142 run @ vue.esm.js?efeb:3219 flushSchedulerQueue @ vue.esm.js?efeb:2981 (anonymous) @ vue.esm.js?efeb:1837 flushCallbacks @ vue.esm.js?efeb:1758 vue.esm.js?efeb:591 [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of null" found in ---> <UxTable> <UxCol> <UxRow> <CustomerDomainCofigDetail> at src/web/manage/customerManage/CustomerDomainCofigDetail.vue <ElMain> <ElContainer> <MainAdmin> at src/web/manage/MainAdmin.vue <App> at src/app.vue <Root> warn @ vue.esm.js?efeb:591 logError @ vue.esm.js?efeb:1737 globalHandleError @ vue.esm.js?efeb:1732 handleError @ vue.esm.js?efeb:1721 Vue._render @ vue.esm.js?efeb:4546 updateComponent @ vue.esm.js?efeb:2788 get @ vue.esm.js?efeb:3142 run @ vue.esm.js?efeb:3219 flushSchedulerQueue @ vue.esm.js?efeb:2981 (anonymous) @ vue.esm.js?efeb:1837 flushCallbacks @ vue.esm.js?efeb:1758 Promise.then (async) microTimerFunc @ vue.esm.js?efeb:1806 nextTick @ vue.esm.js?efeb:1850 queueWatcher @ vue.esm.js?efeb:3068 update @ vue.esm.js?efeb:3209 notify @ vue.esm.js?efeb:697 reactiveSetter @ vue.esm.js?efeb:1014 proxySetter @ vue.esm.js?efeb:3300 (anonymous) @ CustomerDomainCofigDetail.vue?6300:488 Promise.then (async) initData @ CustomerDomainCofigDetail.vue?6300:482 created @ CustomerDomainCofigDetail.vue?6300:627 callHook @ vue.esm.js?efeb:2921 Vue._init @ vue.esm.js?efeb:4630 VueComponent @ vue.esm.js?efeb:4798 createComponentInstanceForVnode @ vue.esm.js?efeb:4310 init @ vue.esm.js?efeb:4131 createComponent @ vue.esm.js?efeb:5608 createElm @ vue.esm.js?efeb:5555 updateChildren @ vue.esm.js?efeb:5845 patchVnode @ vue.esm.js?efeb:5936 patch @ vue.esm.js?efeb:6096 Vue._update @ vue.esm.js?efeb:2670 updateComponent @ vue.esm.js?efeb:2788 get @ vue.esm.js?efeb:3142 run @ vue.esm.js?efeb:3219 flushSchedulerQueue @ vue.esm.js?efeb:2981 (anonymous) @ vue.esm.js?efeb:1837 flushCallbacks @ vue.esm.js?efeb:1758 vue.esm.js?efeb:1741 TypeError: Cannot read property 'length' of null at recursiveRows (utils.js?8c28:43) at normalizeRows (utils.js?8c28:61) at VueComponent.normalizeData (table.js?7ae6:141) at Watcher.get (vue.esm.js?efeb:3142) at Watcher.evaluate (vue.esm.js?efeb:3249) at VueComponent.computedGetter [as normalizeData] (vue.esm.js?efeb:3507) at VueComponent.spinClasses (table.js?7ae6:313) at Watcher.get (vue.esm.js?efeb:3142) at Watcher.evaluate (vue.esm.js?efeb:3249) at Proxy.computedGetter (vue.esm.js?efeb:3507)
該異常原因：由於在頁面加載數據初始化的時候，定義了一個數組的數據類型，從后台獲取數據初始化給該變量賦值，由於后台返回數據為null，將其賦值給數組的時候就報錯了，
解決方法：在賦值的時候加一層為空的判斷和校驗即可解決