I am trying tp pass an id param when the user click on the link generated by but I don't see it in the html
The id should be the currentUserId set or initialised in store .. so I defined a computed prop and appropriate getter ('getCurrentUserId') which pick up the currentUserId from the state..
Where am I wrong ?
<li id="shoppinglists">Shopping Lists</li>
I should get :
href="#/shoppinglists/1"
App.vue
<template>
<div id="app">
<ul class="navigation">
<li id="home"><router-link :to="{ name: 'Home' }" >Home</router-link></li>
<li id="shoppinglists"><router-link :to="{ name: 'ShoppingLists', params: { id: currentUserId } }" >Shopping Lists</router-link></li>
</ul>
<router-view></router-view>
</div>
</template>
<script>
import store from '#/vuex/store'
import { mapGetters } from 'vuex'
export default {
name: 'app',
computed: {
...mapGetters({ currentUserId: 'getCurrentUserId' })
},
store
}
</script>
vuex/getters.js
import _ from 'underscore'
export default {
getCurrentUserId: state => state.currentUserId,
...
}
vuex/store.js
import Vue from 'vue'
import Vuex from 'vuex'
import getters from './getters'
import actions from './actions'
import mutations from './mutations'
Vue.use(Vuex)
const state = {
currentUserId: 1,
...
}
export default new Vuex.Store({
state,
mutations,
getters,
actions
})
Ok got it .. it's not concatenated with the ref url... but using vue web-tools I can see that' the object to: has both the path '/shoppinglists' and params: object {id: 1}... it's not obvious to switch mindset to vue behaviour ...
Related
im beginner and trying something for learn. im using vue js 2 and have a problem with vuex. When I click div of dropdown, I want to add active class and show content of dropdown. The problem is
unknown mutation type: dropdownState.
store.js
import Vue from 'vue';
import Vuex from 'vuex';
Vue.use(Vuex);
export const store = new Vuex.Store({
state: {
active: false,
},
getters: {
isOpen (state) {
return state.active;
},
},
mutation: {
dropdownState (state) {
state.active = !state.active;
console.log('hi');
},
},
});
Dropdown.vue
<template>
<div class="dropdown" #click="dropdownState">
<slot name="button"></slot>
<slot></slot>
</div>
</template>
<script>
import { mapMutations } from 'vuex';
export default {
name: 'Dropdown',
methods: {
...mapMutations(['dropdownState']),
}
};
</script>
DropdownContent.vue
<template>
<div>
<div class="dropdown-content right" :class="{ active : active }"></div>
</div>
</template>
<script>
import { mapState, mapGetters } from 'vuex';
export default {
name: 'DropdownContent',
computed: {
...mapState(['active']),
...mapGetters(['isOpen']),
},
};
</script>
It's supposed to be mutations (with an s)
mutations: {
...
}
https://vuex.vuejs.org/guide/mutations.html#mutations
Btw, it will be actions too!
I'm trying to map my vuex actions (one particularly) but I keep getting the error Property or method "logout" is not defined on the instance but referenced during render.. Here is my component code:
<template>
<header id="header">
<div class="logo">
<router-link to="/">Vue Authenticate</router-link>
</div>
<nav>
<ul>
...
<li v-if="authenticated" #click="logout">
Log Out
</li>
</ul>
</nav>
</header>
</template>
<script>
import { mapGetters, mapActions } from "vuex";
export default {
computed: {
...mapGetters({
authenticated: "isAuthenticated",
}),
},
mathods: {
...mapActions(["logout"]),
},
};
</script>
and here is my store/index.js file:
import Vue from "vue";
import Vuex from "vuex";
import axios from "axios";
import router from "../router/index.js";
Vue.use(Vuex);
export default new Vuex.Store({
actions: {
logout({commit}) {
localStorage.removeItem("idToken");
localStorage.removeItem("userId");
commit("clearData");
router.push("/")
}
},
});
Any idea of where I am missing something? By the way, mapGetters works perfectly fine.
I am using vuex in version 3.4.0.
You are writing "mathods" instead of methods:
methods: {
...mapActions(["logout"]),
},
I am developing a single-page-application using vue-cli3 and npm.
The problem: Populating a basic integer value (stored in a vuex state) named counter which was incremented/decremented in the backend to the frontend, which displays the new value.
The increment/decrement mutations are working fine on both components (Frontend/Backend), but it seems like the mutations don't work on the same route instance: When incrementing/ decrementing the counter in backend, the value is not updated in the frontend and otherwise.
store.js:
Contains the state which needs to be synced between Backend/Frontend.
import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
export default new Vuex.Store({
state: {
counter: 10
},
mutations: {
increment (state) {
state.counter++
},
decrement (state) {
state.counter--
}
}
})
index.js:
Defines the routes that the vue-router has to provide.
import Vue from 'vue'
import Router from 'vue-router'
import Frontend from '#/components/Frontend'
import Backend from '#/components/Backend'
Vue.use(Router)
export default new Router({
routes: [
{
path: '/',
name: 'Frontend',
component: Frontend
},
{
path: '/backend',
name: 'Backend',
component: Backend
}
],
mode: 'history'
})
main.js:
Inits the Vue instance and provides the global store and router instances.
import Vue from 'vue'
import App from './App'
import router from './router'
import { sync } from 'vuex-router-sync'
import store from './store/store'
Vue.config.productionTip = false
sync(store, router)
new Vue({
router,
store,
render: h => h(App)
}).$mount('#app')
Frontend.vue/Backend.vue:
Both (Frontend/Backend) use the same code here.
They use the state counter in order to display and modify it.
<template>
<div> Counter: {{ getCounter }}
<br>
<p>
<button #click="increment">+</button>
<button #click="decrement">-</button>
</p>
</div>
</template>
<script>
export default {
name: 'Frontend',
methods: {
increment () {
this.$store.commit('increment')
},
decrement () {
this.$store.commit('decrement')
}
},
computed: {
getCounter () {
return this.$store.state.counter
}
}
}
</script>
It would be awesome if someone sould tell me what I am missing or if I have misunderstood the concept of vuex and vue-router.
Just get the counter from the store for both components. You don't need data as store is already reactive.
<template>
<div> Counter: {{ counter }}
<br>
<p>
<button #click="increment">+</button>
<button #click="decrement">-</button>
</p>
</div>
</template>
<script>
import { mapState, mapMutations } from 'vuex';
export default {
name: 'Frontend',
methods: {
...mapMutations([
'increment',
'decrement',
])
},
computed: {
...mapState({
counter: state => state.counter,
})
}
}
</script>
For reference:
mapState: https://vuex.vuejs.org/guide/state.html#the-mapstate-helper
mapMutations: https://vuex.vuejs.org/guide/mutations.html#committing-mutations-in-components
#sebikolon component properties that are defined in data () => {} are reactive, methods are not, they are called once. Instead of {{ getCounter }}, just use {{ $store.state.counter }}. OR initiate property in each component that gets the value of your state.
data: function () {
return {
counter: $store.state.counter,
}
}
I've been playing around with Vue.js for the first time and so far, very cool framework.
One scenario I encountered was trying to pass an object from the parent component to a child, then iterate using v-for directive. I went through the documentation and thought I could pass the object through props but I have a feeling since favoriteObj is a computed data object, it has to do with the rendering sequence as I am getting this in the console:
vue.esm.js?efeb:571 [Vue warn]: Property or method "favoriteObj" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.
found in
---> <FavItem> at src/components/FavItem.vue
<FavoriteStuff> at src/components/FavoriteStuff.vue
<App> at src/App.vue
<Root>
Thanks for any info.
Parent:
<template>
<div>
<fav-item :favoriteObj="favoriteObj" ></fav-item>
</div>
</template>
<script>
import {mapGetters} from 'vuex'
import FavItem from '#/components/FavItem'
export default{
name: 'FavoriteStuff',
data (){
return{
uid: localStorage.getItem('_uid'),
}
},
computed: {
...mapGetters([
'favoriteObj'
])
},
created (){
this.$store.dispatch('getFavoriteStuff', {uid: this.uid})
},
components: {FavItem}
}
</script>
Child:
<template>
<div>
<ul class="list-group rpe-list">
<li v-for="item in favoriteObj" :key="item.id" class="list-group-item rpe-item">{{item.fav.name}}</li>
</ul>
</div>
</template>
<script>
export default{
name: 'FavItem',
props: ['favoriteObj']
}
</script>
VUEX Code
actions
export const getFavoriteStuff = ({commit}, {uid}) => {
let favoriteStuff = db.ref( 'stuff-favorites/' + uid );
return favoriteStuff.on('value', function(snapshot){
console.log(snapshot.val)
let favStuff = [];
let idx_counter = 0;
snapshot.forEach(child =>{
idx_counter++;
console.log(child.key)
db.ref('stuff-detail/' + child.key).once('value', function(snapshot){
console.log(snapshot.val())
let obj = {
id: child.key,
recipe: snapshot.val()
}
favStuff.push(obj)
})
})
if (idx_counter === snapshot.numChildren()){
commit('favoriteObj', favStuff)
}
})
}
mutations
export const favoriteObj = (state, payload) => {
state.favoriteObj = payload
}
getter
export const favoriteObj = state => state.favoriteObj;
index
import Vue from 'vue'
import Vuex from 'vuex'
import 'vue-awesome/icons'
import Icon from 'vue-awesome/components/Icon'
import * as getters from './getters'
import * as actions from './actions'
import * as mutations from './mutations'
Vue.use(Vuex)
Vue.component('icon', Icon)
// Define values which will be stored as client-side state
const state = {
favoriteObj: ""
};
// Initialize a store with our getters, actions, mutations, state.
const store = new Vuex.Store({
state,
getters,
actions,
mutations
});
export default store
EDIT:
This was due to a type at the end of my Child component. I simply forgot to close a </script
My component does not update the loaded property when Store.loaded changes:
Component
import { Vue } from 'vue-property-decorator'
import Component from 'nuxt-class-component'
import { Store } from '../repositories'
#Component
export default class Layout extends Vue {
loaded = Store.loaded
}
Store
class Root {
loaded = false
}
export let Store = new Root()
export default Store
In your example Store is just plain function (class), without any reactivity (no Vue watchers attached for Store.loaded field).
Only properties inside component's data are reactive. If you want reactive single store outside of vue components (better for big frontend applications), you should use Vuex
Simple example will be:
App.vue:
<script>
import { mapGetters, mapMutations } from 'vuex';
import store from './store';
import ChildComponent from './components/ChildComponent.vue';
export default {
store,
components: { ChildComponent },
methods: {
...mapMutations(['toggleLoaded']),
},
computed: {
...mapGetters({
isLoaded: 'isLoaded',
}),
}
}
</script>
<template>
<div id="app">
Toggle loaded
<h3>Root component: </h3>
<div>The loaded flag is: {{ isLoaded }}</div>
<ChildComponent />
</div>
</template>
components/ChildComponent.vue:
<script>
import { mapGetters } from 'vuex';
export default {
computed: {
...mapGetters({
isLoaded: 'isLoaded', //accessing to same data, as root through single Vuex state
}),
}
}
</script>
<template>
<div class="hello">
<h3>Child component</h3>
<div>The loaded flag is: {{ isLoaded }}</div>
</div>
</template>
And reactive Vuex store:
store/index.js:
import Vue from 'vue';
import Vuex from 'vuex';
Vue.use(Vuex);
const state = {
loaded: false
};
const getters = {
isLoaded: state => state.loaded,
};
const mutations = {
toggleLoaded: (state) => {
state.loaded = !state.loaded;
}
};
export default new Vuex.Store({
state,
mutations,
// actions,
getters,
strict: true
});
You can find full source of this example on GitHub.