javascript - Vue: Uncaught (in promise) TypeError: Cannot read property '_c' of undefined - Stack Overflow

I need to upgrade project from vue 2 to vue3 I am using coreui template. And in that I have upgrade vue, vuex, vue-router. But when I serve the project it shows the following error in console.

Uncaught (in promise) TypeError: Cannot read property '_c' of undefined

There is no error in terminal. I have updated all router, vuex, vue with vue3 syntax.

Thanks for any help

I need to upgrade project from vue 2 to vue3 I am using coreui template. And in that I have upgrade vue, vuex, vue-router. But when I serve the project it shows the following error in console.

Uncaught (in promise) TypeError: Cannot read property '_c' of undefined

There is no error in terminal. I have updated all router, vuex, vue with vue3 syntax.

Thanks for any help

• javascript
• vue.js
• vuejs3
• core-ui

Share Follow edited Jun 24, 2021 at 12:52 Maulik Shah asked Nov 25, 2020 at 5:28 Maulik ShahMaulik Shah 1,05011 gold badge88 silver badges1818 bronze badges 6

• 2 It seems that CoreUI library doesn't support Vue3 yet github./coreui/coreui-free-vue-admin-template/issues/238 – Eugene Karataev Commented Nov 25, 2020 at 6:50
• @EugeneKarataev As per doc they are supporting vue 3. prnt.sc/vplvd8. Please correct me if I am wrong. – Maulik Shah Commented Nov 25, 2020 at 7:08
• I'm not 100% sure, but it seems that CoreUI v3 is not currently patible with Vue 3, because CoreUI v3 depends on Vue 2 (see dependencies tab): npmjs./package/@coreui/vue – Eugene Karataev Commented Nov 25, 2020 at 7:16
• @EugeneKarataev Thanks! Can you Please share admin template which support vue3. If you have any. – Maulik Shah Commented Nov 25, 2020 at 14:21
• I have the same problem but I'm using BalmUI. I've seen this is patible with vue3. Does anyone know why is this not working? – Bianca Balan Commented Nov 11, 2021 at 13:33

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2 Answers 2

Sorted by: Reset to default 2

I have that problem also by using vue-qrcode-reader.

but I run npm i vue3-qrcode-reader instead of npm i vue-qrcode-reader, that fix my problem.

I guess maybe it doesn't support Vue3 yet.

Please import your Property and provide it at main.ts

Eg :

import { testProviderSymbol, createTestProviderState } from './store/modules/test/TestProvider';

createApp(App)

.provide(blogProviderSymbol, createBlogProviderState())

.mount('#app')