I'm trying to implement this vue draggable component within my component. My component works fine without the draggable component, but once draggable is added everything is blank. I'm thinking that it is a configuration issue. Any assistance would be appreciated.
The most recent error I'm getting is
Invalid vnode type when creating vnode: undefined
<template>
<div :class="['image-select']">
<draggable v-model="images">
<div v-for="image in images"
:class="['image-select-image']"
:key="image.id">
<input type="hidden"
:name="fieldName()"
:value="image.id">
<img :src="imageUrl(image,size)" :alt="image.alt">
</div>
</draggable>
</div>
</template>
<script setup>
import {onBeforeMount, ref} from 'vue';
import api from "../modules/api";
import {draggable} from "vuedraggable";
const props = defineProps({
size: {
type: String,
default: 'sm'
},
name: {
type: String,
default: 'images'
},
selectedValues: {
type: Object,
default: null
}
});
const images = ref([]);
onBeforeMount(async () => {
await Promise.all([
setImages()
]);
});
function fieldName(){
return props.name + '[images][]';
}
function imageUrl(image, size){
return image.src.replace(/\/[a-zA-Z0-9_\.-]+(\.[a-zA-Z]+)$/,'/'+size+'$1');
}
function setImages(){
// load images from ids in selectedValues
}
</script>
According to the documentation, you're supposed to import without curly braces {}
import draggable from 'vuedraggable';
Based on how the vuedraggable component is exported, using the curly braces will make the import fail.
See this codesandbox example
Related
I'm trying to import SVG icons for each item in a v-for loop, with the filename changing depending on the item's id. The icons are loading, but I get the following error for each icon imported.
Is there a better way to approach this?
Uncaught (in promise) TypeError: Failed to resolve module specifier '~/assets/img/flags/ar.svg'
<template>
<NavigationItem v-for="item in topCountries">
<template #icon>
<component :is="getIcon(item.id)" />
</template>
<NavigationItem />
</template>
<script setup>
const getIcon = (id) => defineAsyncComponent(() =>
import(`~/assets/img/flags/${id}.svg`));
</script>
You can have a look at https://nuxt.com/modules/nuxt-svgo module.
This module allows to import SVG.
npm i --save nuxt-svgo
Add it as a module dependency in your nuxt.config file
// nuxt.config.ts
import { defineNuxtConfig } from 'nuxt'
// https://nuxt.com/docs/api/configuration/nuxt-config
export default defineNuxtConfig({
modules: ['nuxt-svgo']
})
Import SVG icons as follow:
<script setup lang="ts">
const getIcon = (id: string) => defineAsyncComponent(() => import(`#/assets/svg/${id}.svg`));
</script>
<template>
<div v-for="item in ['icon1', 'icon2']">
<component :is="getIcon(item)" />
</div>
</template>
Note that if you use Typescript, you will have to create a custom.d.ts file to fix import error
// custom.d.ts
declare module '*.svg' {
import type { DefineComponent } from 'vue'
const component: DefineComponent
export default component
}
calls each icon from the data. uses font awesome icons. you can also add svgs between the i tags
<template>
<ul>
<!-- list rendering -->
<li v-for="item in items">
<span class="icon">
<i :class="[faClass(item.icon)]"
aria-hidden="true"></i>
</span>
</li>
</ul>
</template>
<script>
export default {
name: "navbarMobile",
data() {
return {
//listItems
items: [
{
icon: 'home',
},
{
icon: 'wrench',
},
{
icon: 'project-diagram',
},
{
icon: 'cogs',
},
{
icon: 'phone',
}
]
}
},
methods: {
faClass(icon) {
return `fa fa-${icon}`;
}
}
}
</script>
Us the component name instead of the component path. Also, don't forget to import SVG components and add ?inline at the end of the name.
<template>
<NavigationItem v-for="item in topCountries">
<template #icon>
<component :is="item.icon" />
</template>
<NavigationItem />
</template>
<script setup>
import Eye from '~/assets/img/flags/Eye.svg?inline';
import Balls from '~/assets/img/flags/Balls.svg?inline';
const topCountries = [
{ icon: 'Eye' },
{ icon: 'Balls' }
]
</script>
I'm using Vue3 on a Rails app and struggle with passing the props using composition api:
Rails part:
<% props = {
id: #estimate.document_no_f
}.to_json
%>
<div id="invoice_app" data="<%= props %>"></div>
main.js
const element = document.getElementById("invoice_app")
const data = JSON.parse(element?.getAttribute('data') || '')
console.log(data); <-- {id: 'A-00014'}
if (element != null) {
const app = createApp(
DragDropZone, <-- Component
{
props: ['id']
},
{
id: data.id
}
).mount('#invoice_app');
}
DragDropZone component:
props: {
id: String,
},
setup(props) {
console.log(props); <- undefined
How would I pass the props to the component in the createApp function properly?
You have passed DragDropZone as the first argument to createApp method, which is wrong. The first argument is props & second is your prop data. Components need to be registered separately, like I've shown below. You can refer to component registration page to learn more about component registrations in vue3
Coming to your issue of not being able to receive the props in child component, you need to first pass the props to the child component in order to get them in the composition api.
ex. <drap-drop-zone :id="this.id"></drap-drop-zone>
Only then you will be able to get this in the child component like this:
setup(props){ console.log(props); }
So correct the following line from this:
<div id="invoice_app" data="<%= props %>"></div>
To this:
<div id="invoice_app">
<drap-drop-zone :id="this.id"></drap-drop-zone>
</div>
Sample implementation
const data = {
id: 'A-00014'
};
const app = Vue.createApp({ props: ["id"],}, data);
app.component('drap-drop-zone', {
template: `
<div>
Output from drap-drop-zone: {{ this.id }}
</div>
`,
props: {
id: String
},
setup(props){
console.log(props);
}
});
/**
// or require it from a file
import drapDrop from '/../.../DragDropZone.vue';
app.component('drap-drop-zone', drapDrop);
**/
app.mount("#app");
<script src="https://unpkg.com/vue#next"></script>
<div id="app">
<drap-drop-zone :id="this.id"></drap-drop-zone>
</div>
Hi everyone and sorry for the title, I'm not really sure of how to describe my problem. If you have a better title feel free to edit !
A little bit of context
I'm working on a little personal project to help me learn headless & micro-services. So I have an API made with Node.js & Express that works pretty well. I then have my front project which is a simple one-page vue app that use vuex store.
On my single page I have several components and I want to add on each of them a possibility that when you're logged in as an Administrator you can click on every component to edit them.
I made it works well on static elements :
For example, here the plus button is shown as expected.
However, just bellow this one I have some components, that are loaded once the data are received. And in those components, I also have those buttons, but they're not shown. However, there's no data in this one except the title but that part is working very well, already tested and in production. It's just the "admin buttons" part that is not working as I expect it to be :
Sometimes when I edit some codes and the webpack watcher deal with my changes I have the result that appears :
And that's what I expect once the data are loaded.
There is something that I don't understand here and so I can't deal with the problem. Maybe a watch is missing or something ?
So and the code ?
First of all, we have a mixin for "Auth" that isn't implemented yet so for now it's just this :
Auth.js
export default {
computed: {
IsAdmin() {
return true;
}
},
}
Then we have a first component :
LCSkills.js
<template>
<div class="skills-container">
<h2 v-if="skills">{{ $t('skills') }}</h2>
<LCAdmin v-if="IsAdmin" :addModal="$refs.addModal" />
<LCModal ref="addModal"></LCModal>
<div class="skills" v-if="skills">
<LCSkillCategory
v-for="category in skills"
:key="category"
:category="category"
/>
</div>
</div>
</template>
<script>
import LCSkillCategory from './LCSkillCategory.vue';
import { mapState } from 'vuex';
import LCAdmin from '../LCAdmin.vue';
import LCModal from '../LCModal.vue';
import Auth from '../../mixins/Auth';
export default {
name: 'LCSkills',
components: {
LCSkillCategory,
LCAdmin,
LCModal,
},
computed: mapState({
skills: (state) => state.career.skills,
}),
mixins: [Auth],
};
</script>
<style scoped>
...
</style>
This component load each skills category with the LCSkillCategory component when the data is present in the store.
LCSkillCategory.js
<template>
<div class="skillsCategory">
<h2 v-if="category">{{ name }}</h2>
<LCAdmin
v-if="IsAdmin && category"
:editModal="$refs.editModal"
:deleteModal="$refs.deleteModal"
/>
<LCModal ref="editModal"></LCModal>
<LCModal ref="deleteModal"></LCModal>
<div v-if="category">
<LCSkill
v-for="skill in category.skills"
:key="skill"
:skill="skill"
/>
</div>
<LCAdmin v-if="IsAdmin" :addModal="$refs.addSkillModal" />
<LCModal ref="addSkillModal"></LCModal>
</div>
</template>
<script>
import LCSkill from './LCSkill.vue';
import { mapState } from 'vuex';
import LCAdmin from '../LCAdmin.vue';
import LCModal from '../LCModal.vue';
import Auth from '../../mixins/Auth';
export default {
name: 'LCSkillCategory',
components: { LCSkill, LCAdmin, LCModal },
props: ['category'],
mixins: [Auth],
computed: mapState({
name: function() {
return this.$store.getters['locale/getLocalizedValue']({
src: this.category,
attribute: 'name',
});
},
}),
};
</script>
<style scoped>
...
</style>
And so each category load a LCSkill component for each skill of this category.
<template>
<div class="skill-item">
<img :src="img(skill.icon.hash, 30, 30)" />
<p>{{ name }}</p>
<LCAdmin
v-if="IsAdmin"
:editModal="$refs.editModal"
:deleteModal="$refs.deleteModal"
/>
<LCModal ref="editModal"></LCModal>
<LCModal ref="deleteModal"></LCModal>
</div>
</template>
<script>
import LCImageRendering from '../../mixins/LCImageRendering';
import { mapState } from 'vuex';
import Auth from '../../mixins/Auth';
import LCAdmin from '../LCAdmin.vue';
import LCModal from '../LCModal.vue';
export default {
name: 'LCSkill',
mixins: [LCImageRendering, Auth],
props: ['skill'],
components: { LCAdmin, LCModal },
computed: mapState({
name: function() {
return this.$store.getters['locale/getLocalizedValue']({
src: this.skill,
attribute: 'name',
});
},
}),
};
</script>
<style scoped>
...
</style>
Then, the component with the button that is added everywhere :
LCAdmin.js
<template>
<div class="lc-admin">
<button v-if="addModal" #click="addModal.openModal()">
<i class="fas fa-plus"></i>
</button>
<button v-if="editModal" #click="editModal.openModal()">
<i class="fas fa-edit"></i>
</button>
<button v-if="deleteModal" #click="deleteModal.openModal()">
<i class="fas fa-trash"></i>
</button>
</div>
</template>
<script>
export default {
name: 'LCAdmin',
props: ['addModal', 'editModal', 'deleteModal'],
};
</script>
Again and I'm sorry it's not that I haven't look for a solution by myself, it's just that I don't know what to lookup for... And I'm also sorry for the very long post...
By the way, if you have some advice about how it is done and how I can improve it, feel free, Really. That how I can learn to do better !
EDIT :: ADDED The Store Code
Store Career Module
import { getCareer, getSkills } from '../../services/CareerService';
const state = () => {
// eslint-disable-next-line no-unused-labels
careerPath: [];
// eslint-disable-next-line no-unused-labels
skills: [];
};
const actions = {
async getCareerPath ({commit}) {
getCareer().then(response => {
commit('setCareerPath', response);
}).catch(err => console.log(err));
},
async getSkills ({commit}) {
getSkills().then(response => {
commit('setSkills', response);
}).catch(err => console.log(err));
}
};
const mutations = {
async setCareerPath(state, careerPath) {
state.careerPath = careerPath;
},
async setSkills(state, skills) {
state.skills = skills;
}
}
export default {
namespaced: true,
state,
actions,
mutations
}
Career Service
export async function getCareer() {
const response = await fetch('/api/career');
return await response.json();
}
export async function getSkills() {
const response = await fetch('/api/career/skill');
return await response.json();
}
Then App.vue, created() :
created() {
this.$store.dispatch('config/getConfigurations');
this.$store.dispatch('certs/getCerts');
this.$store.dispatch('career/getSkills');
this.$store.dispatch('projects/getProjects');
},
Clues
It seems that if I remove the v-if on the buttons of the LCAdmin, the button are shown as expected except that they all show even when I don't want them to. (If no modal are associated)
Which give me this result :
Problem is that refs are not reactive
$refs are only populated after the component has been rendered, and they are not reactive. It is only meant as an escape hatch for direct child manipulation - you should avoid accessing $refs from within templates or computed properties.
See simple demo below...
const vm = new Vue({
el: "#app",
components: {
MyComponent: {
props: ['modalRef'],
template: `
<div>
Hi!
<button v-if="modalRef">Click!</button>
</div>`
}
},
data() {
return {
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<my-component :modal-ref="$refs.modal"></my-component>
<div ref="modal">I'm modal placeholder</div>
</div>
The solution is to not pass $ref as prop at all. Pass simple true/false (which button to display). And on click event, $emit the event to the parent and pass the name of the ref as string...
I am terribly new to Vue, so forgive me if my terminology is off. I have a .NET Core MVC project with small, separate vue pages. On my current page, I return a view from the controller that just has:
#model long;
<div id="faq-category" v-bind:faqCategoryId="#Model"></div>
#section Scripts {
<script src="~/scripts/js/faqCategory.js"></script>
}
Where I send in the id of the item this page will go grab and create the edit form for. faqCategory.js is the compiled vue app. I need to pass in the long parameter to the vue app on initialization, so it can go fetch the full object. I mount it with a main.ts like:
import { createApp } from 'vue'
import FaqCategoryPage from './FaqCategoryPage.vue'
createApp(FaqCategoryPage)
.mount('#faq-category');
How can I get my faqCategoryId into my vue app to kick off the initialization and load the object? My v-bind attempt seems to not work - I have a #Prop(Number) readonly faqCategoryId: number = 0; on the vue component, but it is always 0.
My FaqCategoryPAge.vue script is simply:
<script lang="ts">
import { Options, Vue } from "vue-class-component";
import { Prop } from 'vue-property-decorator'
import Card from "#/Card.vue";
import axios from "axios";
import FaqCategory from "../shared/FaqCategory";
#Options({
components: {
Card,
},
})
export default class FaqCategoryPage extends Vue {
#Prop(Number) readonly faqCategoryId: number = 0;
mounted() {
console.log(this.faqCategoryId);
}
}
</script>
It seems passing props to root instance vie attributes placed on element the app is mounting on is not supported
You can solve it using data- attributes easily
Vue 2
const mountEl = document.querySelector("#app");
new Vue({
propsData: { ...mountEl.dataset },
props: ["message"]
}).$mount("#app");
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app" data-message="Hello from HTML">
{{ message }}
</div>
Vue 3
const mountEl = document.querySelector("#app");
Vue.createApp({
props: ["message"]
}, { ...mountEl.dataset }).mount("#app");
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/3.0.0/vue.global.js"></script>
<div id="app" data-message="Hello from HTML">
{{ message }}
</div>
Biggest disadvantage of this is that everything taken from data- attributes is a string so if your component expects something else (Number, Boolean etc) you need to make conversion yourself.
One more option of course is pushing your component one level down. As long as you use v-bind (:counter), proper JS type is passed into the component:
Vue.createApp({
components: {
MyComponent: {
props: {
message: String,
counter: Number
},
template: '<div> {{ message }} (counter: {{ counter }}) </div>'
}
},
}).mount("#app");
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/3.0.0/vue.global.js"></script>
<div id="app">
<my-component :message="'Hello from HTML'" :counter="10" />
</div>
Just an idea (not a real problem)
Not really sure but it can be a problem with Props casing
HTML attribute names are case-insensitive, so browsers will interpret any uppercase characters as lowercase. That means when you're using in-DOM templates, camelCased prop names need to use their kebab-cased (hyphen-delimited) equivalents
Try to change your MVC view into this:
<div id="faq-category" v-bind:faq-category-id="#Model"></div>
Further to Michal Levý's answer regarding Vue 3, you can also implement that pattern with a Single File Component:
app.html
<div id="app" data-message="My Message"/>
app.js
import { createApp } from 'vue';
import MyComponent from './my-component.vue';
const mountEl = document.querySelector("#app");
Vue.createApp(MyComponent, { ...mountEl.dataset }).mount("#app");
my-component.vue
<template>
{{ message }}
</template>
<script>
export default {
props: {
message: String
}
};
</script>
Or you could even grab data from anywhere on the parent HTML page, eg:
app.html
<h1>My Message</h1>
<div id="app"/>
app.js
import { createApp } from 'vue';
import MyComponent from './my-component.vue';
const message = document.querySelector('h1').innerText;
Vue.createApp(MyComponent, { message }).mount("#app");
my-component.vue
<template>
{{ message }}
</template>
<script>
export default {
props: {
message: String
}
};
</script>
To answer TheStoryCoder's question: you would need to use a data prop. My answers above demonstrate how to pass a value from the parent DOM to the Vue app when it is mounted. If you wanted to then change the value of message after it was mounted, you would need to do something like this (I've called the data prop myMessage for clarity, but you could also just use the same prop name message):
<template>
{{ myMessage }}
<button #click="myMessage = 'foo'">Foo me</button>
</template>
<script>
export default {
props: {
message: String
},
data() {
return {
myMessage: this.message
}
}
};
</script>
So I'm not at all familiar with .NET and what model does, but Vue will treat the DOM element as a placeholder only and it does not extend to it the same functionality as the components within the app have.
so v-bind is not going to work, even without the value being reactive, the option is not there to do it.
you could try a hack to access the value and assign to a data such as...
const app = Vue.createApp({
data(){
return {
faqCategoryId: null
}
},
mounted() {
const props = ["faqCategoryId"]
const el = this.$el.parentElement;
props.forEach((key) => {
const val = el.getAttribute(key);
if(val !== null) this[key] = (val);
})
}
})
app.mount('#app')
<script src="https://unpkg.com/vue#3.0.0-rc.11/dist/vue.global.prod.js"></script>
<div id="app" faqCategoryId="12">
<h1>Faq Category Id: {{faqCategoryId}}</h1>
</div>
where you get the value from the html dom element, and assign to a data. The reason I'm suggesting data instead of props is that props are setup to be write only, so you wouldn't be able to override them, so instead I've used a variable props to define the props to look for in the dom element.
Another option
is to use inject/provide
it's easier to just use js to provide the variable, but assuming you want to use this in an mvc framework, so that it is managed through the view only. In addition, you can make it simpler by picking the exact attributes you want to pass to the application, but this provides a better "framework" for reuse.
const mount = ($el) => {
const app = Vue.createApp({
inject: {
faqCategoryId: {
default: 'optional'
},
},
})
const el = document.querySelector($el)
Object.keys(app._component.inject).forEach(key => {
if (el.getAttribute(key) !== null) {
app.provide(key, el.getAttribute(key))
}
})
app.mount('#app')
}
mount('#app')
<script src="https://unpkg.com/vue#3.0.0-rc.11/dist/vue.global.prod.js"></script>
<div id="app" faqCategoryId="66">
<h1>Faq Category Id: {{faqCategoryId}}</h1>
</div>
As i tried in the following example
https://codepen.io/boussadjra/pen/vYGvXvq
you could do :
mounted() {
console.log(this.$el.parentElement.getAttribute("faqCategoryId"));
}
All other answers might be valid, but for Vue 3 the simple way is here:
import {createApp} from 'vue'
import rootComponent from './app.vue'
let rootProps = {};
createApp(rootComponent, rootProps)
.mount('#somewhere')
I have a problem where a component within a router-view that is being kept alive does not call its activated lifecycle hook when first created. The created and mounted lifecycle hooks are being called. On a second visit, the activated hook is being called.
The scenario is quite complicated as there is a bit of nesting and slot using involved.
I've tried to create a minimal example which you can find below, or a bit more detailed on https://codesandbox.io/s/251k1pq9n.
Unfortunately, it is quite large and still not as complicated as the real code which I unfortunately cannot share.
Worse, I failed to reproduce the actual problem in my minimal example. Here, the created, mounted, and activated lifecycle hooks are all called when first visiting SlotExample.
In my real code, only the created and mounted, lifecycle hooks are called on the first visit, the activated hook is called on subsequent visits. Interestingly, all lifecycle hooks are called as expected for SlotParent.
The real code involves more nesting and makes use of slots to use layout components.
My code is using Vue 2.5.16 and Vue-Router 3.0.1 but it also doesn't work as expected in Due 2.6.7 and Vue-Router 3.0.2. I am also using Vuetify and Vue-Head but don't think think this has anything to do with my problem.
index.js.
Does anyone have an idea what I could have been doing wrong. I actually suspect a bug in vue-router
when using multiple nested slots and keep-alive but cannot reproduce.
index.js
import Vue from "vue";
import VueRouter from "vue-router";
import App from "./App.vue";
import Start from "./Start.vue";
import SlotExample from "./SlotExample.vue";
const routes = [
{
path: "/start",
component: Start
},
{
path: "/slotExample/:id",
component: SlotExample,
props: true
}
];
const router = new VueRouter({ routes });
Vue.use(VueRouter);
new Vue({
render: h => h(App),
router,
components: { App }
}).$mount("#app");
App.vue
<template>
<div id="app">
<div>
<keep-alive><router-view/></keep-alive>
</div>
</div>
</template>
SlotExample.vue
<template>
<div>
<h1>Slot Example</h1>
<router-link to="/start"><a>start</a></router-link>
<router-link to="/slotExample/123">
<a>slotExample 123</a>
</router-link>
<slot-parent :id="id">
<slot-child
slot-scope="user"
:firstName="user.firstName"
:lastName="user.lastName"/>
</slot-parent>
</div>
</template>
<script>
import SlotParent from "./SlotParent.vue";
import SlotChild from "./SlotChild.vue";
export default {
name: "slotExample",
components: { SlotParent, SlotChild },
props: {
id: {
type: String,
required: true
}
}
};
</script>
SlotParent.vue
<template>
<div>
<div slot="header"><h1>SlotParent</h1></div>
<div slot="content-area">
<slot :firstName="firstName" :lastName="lastName" />
</div>
</div>
</template>
<script>
export default {
name: "slotParent",
props: {
id: {
type: String,
required: true
}
},
computed: {
firstName() {
if (this.id === "123") {
return "John";
} else {
return "Jane";
}
},
lastName() {
return "Doe";
}
}
};
</script>
SlotChild.vue
<template>
<div>
<h2>SlotChild</h2>
<p>{{ firstName }} {{ lastName }}</p>
</div>
</template>
<script>
export default {
name: "slotChild",
props: {
firstName: {
type: String,
required: true
},
lastName: {
type: String,
required: true
}
},
created() {
console.log("slotChild created");
},
mounted() {
console.log("slotChild mounted");
},
activated() {
console.log("slotChild activated");
}
};
</script>
I think you need to put SlotChild within keep-alive block.
Take a look at vue js doc about activated hook