本文为博主原创，未经允许不得转载：

异常展示：

[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)

该异常原因：由于在页面加载数据初始化的时候，定义了一个数组的数据类型，从后台获取数据初始化给该变量赋值，由于后台返回数据为null，将其赋值给数组的时候就报错了，

解决方法：在赋值的时候加一层为空的判断和校验即可解决

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