第8行和第23行没有调用length，为什么vue不能告诉我错误的行号？
vue.runtime.esm.js?2b0e:619 [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of undefined"
found in
---> <IsoDeals> at src/views/iso/Deals.vue
<VContent>
<VApp>
<App> at src/App.vue
<Root>
vue.runtime.esm.js?2b0e:1888 TypeError: Cannot read property 'length' of undefined
at Proxy.render (eval at ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"1c8c67b2-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js?!./node_modules/vuetify-loader/lib/loader.js?!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader/lib/index.js?!./src/views/iso/Deals.vue?vue&type=template&id=13ff2f9a&scoped=true& (8.js:23), <anonymous>:235:70)
at VueComponent.Vue._render (vue.runtime.esm.js?2b0e:3548)
at VueComponent.updateComponent (vue.runtime.esm.js?2b0e:4066)
at Watcher.get (vue.runtime.esm.js?2b0e:4479)
at new Watcher (vue.runtime.esm.js?2b0e:4468)
at mountComponent (vue.runtime.esm.js?2b0e:4073)
at VueComponent.Vue.$mount (vue.runtime.esm.js?2b0e:8415)
at init (vue.runtime.esm.js?2b0e:3118)
at merged (vue.runtime.esm.js?2b0e:3301)
at createComponent (vue.runtime.esm.js?2b0e:5978)
我发现这是错误的代码。
第16-26行。在第24行调用
leads.length。那么，为什么vue不告诉我这些行号？
<v-data-table
:headers="leadHeaders"
:items="leads"
:items-per-page-options="[
10,
20,
{ text: '$vuetify.dataIterator.rowsPerPageAll', value: -1 }
]"
:hide-default-footer="leads.length < 10"
class="elevation-1"
>
最佳答案
Vue为什么不告诉我错误的行号？
因为它isn't supported，至少在版本2中是这样。在源地图的计算方式上有一些改进。