In V3 this.$f7.views.main.router.back() function work fine, but in V4 get error:
vue.common.dev.js:630 [Vue warn]: Error in v-on handler: "TypeError: Cannot read property 'router' of undefined"
found in
---> <F7Button>
<F7PageContent>
<F7Page>
<AddPet> at src/pages/add-pet.vue
<F7View>
<F7App>
<App> at src/main.vue
<Root>
warn @ vue.common.dev.js:630
logError @ vue.common.dev.js:1875
globalHandleError @ vue.common.dev.js:1870
handleError @ vue.common.dev.js:1840
invokeWithErrorHandling @ vue.common.dev.js:1857
invoker @ vue.common.dev.js:2170
invokeWithErrorHandling @ vue.common.dev.js:1852
Vue.$emit @ vue.common.dev.js:3790
(anonymous) @ vue-component-dispatch-event.js:14
exports.default @ vue-component-dispatch-event.js:13
dispatchEvent @ button.js:220
onClick @ button.js:213
vue.common.dev.js:1879 TypeError: Cannot read property 'router' of undefined
at VueComponent.petsToDb (add-pet.vue?./node_modules/babel-loader/lib??ref--6!./node_modules/vue-loader/lib??vue-loader-options:110)
at invokeWithErrorHandling (vue.common.dev.js:1852)
at VueComponent.invoker (vue.common.dev.js:2170)
at invokeWithErrorHandling (vue.common.dev.js:1852)
at VueComponent.Vue.$emit (vue.common.dev.js:3790)
at eval (vue-component-dispatch-event.js:14)
at Array.forEach (<anonymous>)
at exports.default (vue-component-dispatch-event.js:13)
at VueComponent.dispatchEvent (button.js:220)
at VueComponent.onClick (button.js:213)