I have a requirement where I need to set Global Axios header and refresh session(Calling multiple Api's). In vuejs we would have a App.vue which is the entry point for our application we would do these types of processing in that.
App.vue
export default {
async created(){
await this.$store.dispatch('initateSession');
}
}
The benefits of doing this is that this is called only once(not on every route change), and on every page load, I am looking to implement the same functionlity in Nuxt.
Now as we dont have any App.vue in case of Nuxt one solution that i could think off is to create a middleware for this , which can work but that will be called on every route change I dont want that, does anyone know any workaround for it?
Instead of middleware you can create a plugin:
plugins/session.js:
window.onNuxtReady(() => {
// Do something
})
And then add it to the plugins section inside nuxt.config.js.
Related
I have a Vue app which does a little localStorage and server check on app load, to determine where to initially route the user.
This is in the App's main entry component, in the created() hook
My problem is that the default / route's Component visibly loads first, then the server call and everything happens which causes the user the route to their correct location
How can I delay the rendering of the initial component until my app's main component created() method completes, and then purposely navigates the user to the correct route?
I had this problem before and I firmly believe that you must have the initial files for your routes and your router configuration.
In the configuration, you could handle the permission and router before each route and with next() . In the router file, you can set your params and check them in the index.js file(router configuration)
you could also use your localStorage data in Router.beforeeach
EDIT: I just saw you used the created method... like mentioned below use beforeRouteEnter instead with the next() parameter it provides
First of all I wouldn't recommend using a delay but instead a variable that keeps track if the API call is done or not. You can achieve this using the mounted method:
data() {
return {
loaded: false,
}
}
async mounted() {
await yourAPICALL()
if (checkIfTokenIsOkay) {
return this.loaded = true;
}
// do something here when token is false
}
Now in your html only show it when loaded it true:
<div v-if="loaded">
// html
</div>
An better approuch is using the beforeRouteEnter method which allows you to not even load the page instead of not showing it: https://router.vuejs.org/guide/advanced/navigation-guards.html
I'm starting Nuxt project and I have to fetch basic data from my backend.
for example language dictionary or some data for leftbar and etc.
in Vue I can just call everything I need in App.vue and save it in vuex and then use whenever I want, but with Nuxt every page is different and I'm curious where should i call this global data api calls.
I'm guessing I have to create middleware and call actions if data is not loaded already or there is better solution?
You mention it's global data and you're using universal mode- I think you're looking for nuxtServerInit(). This store action runs once on the server, before created, mounted hooks etc. You can use it to populate your store with data that your components (including pages) rely on.
Take a look at the docs.
actions: {
nuxtServerInit ({ commit }, { req }) {
if (req.session.user) {
commit('user', req.session.user)
}
}
}
I am trialling a project in Nuxt. Liking it so far except I am a little confused as to how to load data from an external async service so that it is available in Vuex from the very first route.
I have tried adding middleware on the default layout to dispatch the store action but I do not see the service being called straight away. Only when I navigate deeper into the routes do I see the action dispatched.
I did something similar in a standard Vue project and added the created method to the App.vue.
Is there a similar way in Nuxt?
What you need is called a fetch.
The fetch method, if set, is called every time before loading the component (only for page components). It will be called server-side once (on the first request to the Nuxt app) and client-side when navigating to further routes.
Warning: You don't have access of the component instance through this inside fetch because it is called before initiating the component.
async fetch({ store }) {
await store.dispatch('your-action')
}
If you need parameter:
async fetch({ store, params }) {
await store.dispatch('your-action', params.id)
}
I gave an example of id. The name of the parameter depends on the name of your page.
_id => params.id
_slug => parmas.slug
...
When using the Apollo module in a Nuxt app, the default behavior when changing routes is to render the new page immediately, before data has been fetched via Apollo.
This results in some pretty janky rendering experiences where the page does a partial render and very soon after completes rendering with data from the server, making everything on the page shift due to the changing size of components that now have data. This looks pretty bad because the data actually comes back fairly quickly, so it would be fine to wait for the data to return before rendering the new route.
What's the recommended way of waiting on the Apollo queries on a page (and its subcomponents) to complete before rendering the page?
(There's a related question that's not specific to Nuxt, but I'm not sure how to translate the recommendation to a Nuxt app.)
I'd love to see a code example of using beforeRouteEnter to fetch data via Apollo and only entering the route once the data is fetched.
Haven't used this module before, but it should be like any other async action you want to perform before page rendering in Nuxt.
It only depends if you want to pre-fill the store:
https://github.com/nuxt-community/apollo-module#nuxtserverinit
https://nuxtjs.org/guide/vuex-store/#the-nuxtserverinit-action
or only one page:
https://github.com/nuxt-community/apollo-module#asyncdatafetch-method-of-page-component
https://nuxtjs.org/guide/async-data
You can use async/await or promises if you have more than one request before page should be rendered.
When async actions are finished, Nuxt starts rendering the page. This works for SSR and if you navigate to pages on the client (nuxtServerInit will only fire once when real request is made, not when navigating on client side).
Side note: beforeRouteEnter is usually used, to validate params and check if the route is allowed.
did you try disabling the prefetch?
prefetch: false
The best approach is to use the loading attribute:
<template>
<div v-if="!this.$apollo.loading">
Your product: {{product}}
</div>
</template>
<script>
export default {
name: "Product",
apollo: {
product: {
query: productQuery,
variables() {
return {
productId: this.productId
}
}
}
}
}
</script>
I'm unfamiliar with Apollo, but I think this is what you are looking for:
// Router.js
beforeRouteEnter(to, from, next)
{
executeSomeApolloPromise().then((data) => {
// The promise has now been complete; continue to the component.
next((vm) => {
// You have access here to the component instance via `vm`.
// Note that `beforeRouteEnter` is the only guard that has this.
vm.someApolloData = data;
});
});
}
See https://router.vuejs.org/guide/advanced/navigation-guards.html#per-route-guard
I have an App.vue component where I want to load the currently logged in user. I also want to redirect the user when he\she tries to go the login route and the currently logged in user is already saved in context (he's already signed in).
// inside App.vue component
created() {
AuthService.getCurrentUser().then((user) => {
this.user = user;
});
}
I have a check in the created method of the login component for whether the currentUser is setted, but then when the user tries to go to the login page it might be possible that the the request for the current user is not finished.
My question is:
How do I wait for the data to load before the App.vue component loads?
I saw something like this:
waitForData: true,
data(transition) {
return AuthService.getCurrentUser().then(currentUser => {
transition.next({ currentUser });
});
}
which doesn't actually wait for the data to be loaded and the component loads anyway.
Edit: I'm aware of beforeRouteEnter but this is App.vue component which is a parent component of all components and not a route specific component.
I ran into a very similar problem and solved by adding a v-if on the element that wrapped the child component that depends on the loaded data. And then of course have an data property to control that v-if. If you don't have a wrapping element you can always use a template element to do the wrapping.
This is not the Vue way of doing things.
Use VUEX to store your currentUser object
Set up the Vuex getters in App.vue's computed section. Your template will be updated dynamically once the data is ready.
See the mapGetters section in this page. It works very well with the computed mechanism.
You can also use v-if in your relevant component, so that the component won't be created before your data is ready in VUEX.
If using vue-router, you can use the beforeRouteEnter guard to load data async, as described here: https://router.vuejs.org/en/advanced/data-fetching.html
One way I can think of is when the user is loaed in the App.vue component to check the current path and if it's \login to redirect.
Something like this:
created() {
AuthService.getCurrentUser()
.then(user => this.setCurrentUser(user))
.then(() => {
const { path } = this.$router.currentRoute;
if (path === '/login') {
this.$router.push('/');
}
});