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Render default child vue-router 4

I'd like to ask about render default child for view.
I know that exists topic with a similar problem but I'm pretty sure that it was for VUE2 and older vue-router. I'm having trouble rendering the default child for view Category. When I'd go to <router-link :to="{ name: routeName, params: { category: item.id } }
everything render okay except <router-view /> it's empty...
I came up with a solution with beforeUpdate(),beforeCreate() but it seems like reinventing the wheel.
If I go to /category/{id} then to /category/{id}/room/{id} and go back one page, the default view will be rendered
How to make the default child load after going to /category/{id}?
router.js
{
path: '/category/:category',
name: 'Category',
props: true,
component: Category,
children: [
{
path: '',
name: 'FavouriteDevicesInCategory',
component: Devices,
props: true,
},
{
path: 'room/:room',
name: 'Devices',
component: Devices,
props: true,
},
],
},
Category.vue - view
<template>
<div class="control">
<div class="left">
[...]
</div>
<div class="right">
<router-view />
</div>
</div>
</template>
<script>
export default {
props: ['category', 'room'],
/** generate default router-view */
beforeUpdate() {
this.$router.push('');
},
beforeCreate() {
this.$router.push('');
},
};

If your default component is Category, you have to create the routes like this:
{
path: '/category',
name: 'Category',
props: true,
component: Category,
children: [
{
path: '/:categoryId',
name: 'FavouriteDevicesInCategory',
component: Devices,
props: true,
},
{
path: 'room/:roomId',
name: 'Devices',
component: Devices,
props: true,
},
],
},
By default it will render the Category component and if you add an id to the url it will go the the Devices component

I think I found a solution, a little messy, but it seems to be the best solution to this problem
{
path: '/category/:category',
// name: 'Category',
props: true,
component: Category,
children: [
{
path: '',
name: 'Category',
component: Devices,
props: true,
},
{
path: 'room/:room',
name: 'Devices',
component: Devices,
props: true,
},
],
},

Passing props (array) into a router-link path

I'm trying to dynamically update a <router-link> path based on what view component it is used within. Below is the <router-link> that is looping through the compItems array which is populated by each view component.
<router-link :to="{ name: compItem.name, params: { compItems: compItem.router } }" class="cz-ds-view-related-comp" v-for="compItem in compItems" :key="compItem.name">
<div class="related-comp_icon"><img class="related-comp_icon" :src="require('#/assets/home/icons/' + compItem.atomicIcon + '')" alt=""></div>
<div class="related-comp_title"><h3>{{ compItem.name }}</h3> <img src="../../assets/home/icons/arrow-right.svg"></div>
</router-link>
export default {
name: 'relatedSection',
props: {
compItems: {
type: Array
}
}
}
</script>
Below is an example of a view component defining router.
data () {
return {
compItems: [
{ name: 'Links', atomicIcon: 'atom.svg', router: 'links'},
{ name: 'Form Elements', atomicIcon: 'atom.svg', router: 'form-elements'},
{ name: 'Avatars', atomicIcon: 'atom.svg', router: 'avatars'},
{ name: 'Badges', atomicIcon: 'atom.svg', router: 'badges'}
]
}
}
And this is the console error I'm getting.
Thanks in advance!
Edit:
Here's a snapshot of the router file:
const routes = [{
path: '/',
name: 'home',
props: true,
component: Home
}, {
path: '/avatars',
name: 'avatars',
props: true,
component: Avatars
}, {
path: '/badges',
name: 'badges',
props: true,
component: Badges
}, {
path: '/buttons',
name: 'buttons',
props: true,
component: Buttons
}, {
path: '/breadcrumbs',
name: 'breadcrumbs',
props: true,
component: Breadcrumbs
}, {
path: '/form-elements',
name: 'form-elements',
props: true,
component: FormElements
}, {
path: '/icons',
name: 'icons',
props: true,
component: Icons
},
...

The router's route definitions all have lowercase name properties. When you use a <router-link> to access them by name, you need to use an exact match, but your compItems have capitalized names.
Also, you are using route params in the link but none of your routes have any defined.
Here is a refactoring to make the code clearer and correct:
<template v-for="compItem in compItems">
<router-link :to="{ name: compItem.name }" class="cz-ds-view-related-comp">
<div class="related-comp_icon">
<img class="related-comp_icon" :src="require('#/assets/home/icons/' + compItem.atomicIcon + '')" alt="">
</div>
<div class="related-comp_title">
<h3>{{ compItem.title }}</h3>
<img src="../../assets/home/icons/arrow-right.svg">
</div>
</router-link>
</template>
data () {
return {
compItems: [
{ title: 'Links', atomicIcon: 'atom.svg', name: 'links'},
{ title: 'Form Elements', atomicIcon: 'atom.svg', name: 'form-elements'},
{ title: 'Avatars', atomicIcon: 'atom.svg', name: 'avatars'},
{ title: 'Badges', atomicIcon: 'atom.svg', name: 'badges'}
]
}
}

Convert an array to a component in React

In the project there is an array of objects used for populating the breadcrumb:
export const BREADCRUMBS_LIST = [
{ label: 'Home', path: '/', active: false },
{ label: 'Account', path: '/accounts', active: false },
{ label: 'This Account', path: '/accounts', active: true }
];
it is used to populate the list in the Breadcrumbs component:
import { BREADCRUMBS_LIST } from './...'
...
<Breadcrumbs list={BREADCRUMBS_LIST} />
Everything works fine.
The problem appears when we need to translate those labels based on the user's language. For this, we are using react-intl.
So, I transformed the original array into a component of this form:
import { useIntl } from 'react-intl';
export const BreadcrumbsList = () => {
const intl = useIntl();
return [
{ label: intl.formatMessage({ id: 'Home' }), path: '/', active: false },
{
label: intl.formatMessage({ id: 'Account' }),
path: '/accounts',
active: false
},
{
label: intl.formatMessage({ id: 'This Account' }),
path: '/accounts',
active: true
}
];
};
and use it like this:
<Breadcrumbs list={BreadcrumbsList} />
it seems to be wrong because it returns an error saying:
Cannot read property 'map' of undefined.
In that component, the list was used with map: {list.map(({path, label, active}, index) => {...})
Any ideas how to solve this problem?

Your BreadcrumbsList is actually a custom hook, in order to stick with the Rules of Hooks you need to call it on component's level:
// Add "use" prefix as its a custom hook
const useBreadcrumbsList = () => {
const intl = useIntl();
return [
{ label: intl.formatMessage({ id: "Home" }), path: "/", active: false },
{
label: intl.formatMessage({ id: "Account" }),
path: "/accounts",
active: false,
},
{
label: intl.formatMessage({ id: "This Account" }),
path: "/accounts",
active: true,
},
];
};
// Usage
const Component = () => {
const breadcrumbsList = useBreadcrumbsList();
return <Breadcrumbs list={breadcrumbsList} />;
};

after login when click hardware back button navigated to login page how to prevent it in ionic 4

const routes: Routes = [
{
path: '',
component: TabsPage,
children: [
//new page add
{
path: 'home',
children: [
{
path: '', loadChildren: () => import('../AllPages/home/home.module').then(m => m.HomePageModule)
},
{
path: 'new-arrival',
children: [
{
path: '',
loadChildren: () => import('../AllPages/new-arrival/new-arrival.module').then(m => m.NewArrivalPageModule)
},
{
path: 'product-item-list',
children: [
{
path: '',
loadChildren: () => import('../Allpages/product-item-list/product-item-list.module').then(m => m.ProductItemListPageModule)
},
{
path: 'product-details',
children: [
{
path: '',
loadChildren: () => import('../Allpages/product-details/product-details.module').then(m => m.ProductDetailsPageModule)
},
]
}
]
}
]
},

Use Ionic NavController instead of Angular Router.
Then, use the navigateRootmethod.
Going root means that all existing pages in the stack will be removed, and the navigated page will become the single page in the stack.
import { NavController } from '#ionic/angular';
...
constructor(private navController: NavController) {}
...
this.navController.navigateRoot('/tabs/home');

ES6 get properties from nested objects

i'm doing a project with VueJS, Lodash and Babel, and my problem is that i need to populate a sidebar in my app with routes from a routes.js file. Problem is i don't really know how i can retrieve the data i need.
export default [
{
path: "/admin/login",
name: "admin.login",
component: Login
},
{
path: "/admin",
component: MasterLayout,
meta: { auth: true },
children: [
{
path: "/admin/dashboard",
alias: "/",
menu: { text: "", icon: ""},
name: "admin.dashboard",
component: DashboardIndex
}
]
},
{
path: '/403',
name: 'error.forbidden',
component: ErrorForbidden
},
{
path: "*",
name: 'error.notfound',
component: ErrorPageNotFound
}
];
That is my routes file, i basically need to iterate over each route, check if it has children or a menu property, if it has a menu it gets added to my list of sidebar items, and it's children get added as well with their own menu properties being withdrawn
In the end i'd like to get something like the following
sidebarItems: [
{
name: 'Dashboard',
icon: 'dashboard',
name: 'admin.dashboard'
},
{
name: 'OtherRoute',
icon: 'other-route',
name: 'admin.other-route',
children: [
{
name: 'SubRoute',
icon: 'sub-route',
name: 'admin.sub'
}
]
}
]
This should only account for the routes that contain a menu property.

You basically need iterate recursive over the array, so please try this:
function iterateArrayRoutes(routeArray) {
if(routeArray instanceof Array) {
var routeFormatted = routeArray.reduce(function(last, route){
if (route.hasOwnProperty("menu")) {
var item = {
name: route.name,
icon: route.menu.icon
};
if(route.hasOwnProperty("children") && route.children.length > 0) {
item.children = iterateArrayRoutes(route.children);
}
last.push(item);
}
return last;
}, []);
return routeFormatted;
}
};
Here you have a Demo https://jsfiddle.net/vm1hrwLL/