Can't get this to work in my app [Vue v2]

[geoidesic]

If I try use this in my app, I just see this in the console:

[Vue warn]: Failed to mount component: template or render function not defined.

I tried copying your whole example and replacing my component with that, which kinda worked, but I still get this warning:

Property or method "wrapperClass" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

And even then, if I set the initial online state = false, it never changes... so it is not detecting online status. This is also true in the code sandbox demo.

Changing the network status (e.g. switching off WiFi) has no effect.

[vinayakkulkarni]

Can you please create a codesandbox or stackblitz repro demo?

[reekoz]

I had same problem but found the issue: in main.js was missing Vue.use(VueCompositionApi)

[vinayakkulkarni]

For < v2.3.0, you need to have VueCompositionApi to be added before using v-offline component., for v2.4.0 which requires vue 2.7, you don't have to use VueCompositionApi anymore as it is part of Vue 2.7.x