I would like to create a route that displays a component conditionally.
For example, a user hits the /home route. If the user is a mentor, display MentorHomeComponent; otherwise display MenteeHomeComponent.
What is the best way to do this?
This is one short way :
Home.vue
export default {
data() {
return {
mentor: false
}
},
mounted() {
this.mentor ? this.$router.push({name : 'MentorHomeComponent'})
: this.$router.push({name : 'MenteeHomeComponent'})
}
}
<template>
<div id="app">
<router-view></router-view>
</div>
</template>
<component :is="componentName"></component>. Just display appropriate component depending on user privileges, using computed property.
<template lang="pug">
component(:is="appropriateComponent")
</template>
<script>
import { mapGetters } from "vuex";
export default {
components: {
FirstComponent: () => import("#/views/FirstComponent"),
SecondComponent: () => import("#/views/SecondComponent")
},
computed: {
...mapGetters("user", ["isAdmin"]),
appropriateComponent() {
return this.isAdmin ? "FirstComponent" : "SecondComponent";
}
}
};
</script>
Related
I try to transfer data to my component using props
If I type the name in the parent, I see that the button is working properly, ie the problem is with the component.
Where am I wrong?
Thanks in advance
Parent:
HTML
<div><button #click="changeName" :name="name">Change my name</button></div>
Script:
import UserDetail from "./UserDetail.vue";
export default {
components: {
UserDetail,
UserEdit,
},
data() {
return {
name: "Eden",
};
},
methods: {
changeName() {
this.name = "EdenM";
},
},
};
Component
<template>
<div>
<p>{{ name }}</p>
</div>
</template>
<script>
export default {
props: ["name"],
};
</script>
Ooooooh!! I add the prop an wrong place!
Here is my ans:
<user-detail :name="name"></user-detail>
I have a string (example, because it's an object with many key/values, want to loop and append to htmloutput) with a component name. Is it possible to render/build the component inside a method and display the html output?
Is that possible and how can i achieve that?
<template>
<div v-html="htmloutput"></div>
</template>
<script>
export default {
component: {
ComponentTest
},
data() {
return {
htmloutput: ''
}
},
methods:{
makeHtml(){
let string = 'component-test';//ComponentTest
//render the ComponentTest directly
this.htmloutput = ===>'HERE TO RENDER/BUILD THE COMPONENTTEST'<==
}
},
created(){
this.makeHtml();
}
</script>
You might be looking for dynamic components:
https://v2.vuejs.org/v2/guide/components-dynamic-async.html
Example:
<template>
<component :is="changeableComponent">
</component>
</template>
<script>
import FirstComponent from '#/views/first';
import SecondComponent from '#/views/second';
export default {
components: {
FirstComponent, SecondComponent
},
computed: {
changeableComponent() {
// Return 'first-component' or 'second-component' here which corresponds
// to one of the 2 included components.
return 'first-component';
}
}
}
</script>
Maybe this will help - https://forum.vuejs.org/t/how-can-i-get-rendered-html-code-of-vue-component/19421
StarRating is a sample Vue component. You can get it HTML code by run:
new Vue({
...StarRating,
parent: this,
propsData: { /* pass props here*/ }
}).$mount().$el.outerHTML
in Your method. Remember about import Vue from 'vue'; and of course import component.
What you're trying to do really isn't best practice for Vue.
It's better to use v-if and v-for to conditionally render your component in the <template> section.
Yes you can use the render function for that here is an example :
Vue.component('CompnentTest', {
data() {
return {
text: 'some text inside the header'
}
},
render(createElement) {
return createElement('h1', this.text)
}
})
new Vue({
el: '#app',
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<Compnent-test />
</div>
Or :
if you are using Vue-cli :
on your componentTest component :
export default {
render(createElement) {
return createElement('h1', 'sometext')
}
// Same as
// <template>
// <h1>sometext</h1>
// </template>
//
}
and on your root element (App.vue as default) :
export default {
....
component: {
ComponentTest
}
}
<template>
<div>
....
<Component-test />
</div>
</template>
example : codesandbox
you can read more about
Render Functions & JSX
Parent component (Dashboard):
<template>
<div id="dashboard">
<Header />
<b-container>
<div>
<b-row>
<b-col>
<Overview />
</b-col>
</b-row>
</div>
</b-container>
</div>
</template>
<script>
import Header from '#/components/common/Header';
import Overview from '#/components/dashboard/Overview';
import { mapGetters } from 'vuex';
export default {
name: 'dashboard',
components: {
Header,
Overview
},
mounted() {
const sessionId = this.$cookie.get('connect.sid');
this.$store.dispatch('user/getUser', sessionId).then((userData) => {
this.$store.dispatch('project/getProject', userData.data.user);
});
},
computed: {
...mapGetters('user', {
user: 'getUser'
})
}
}
</script>
Child component (Overview):
<template>
<div class="overview">
<div class="overview__title">
<h1>
Welcome {{user.cn[0]}} // Works
</h1>
</div>
<div class="overview__project">
<p v-for="project in runningprojects" :key="project._id">
{{project.name}} // Does not work at refresh
</p>
</div>
</div>
</template>
<script>
import {mapGetters} from 'vuex';
export default {
name: 'dashboard-overview',
data() {
return {
runningprojects: []
}
},
computed: {
...mapGetters('user', {
user: 'getUser'
}),
...mapGetters('project', {
projects: 'getProjects',
allProjects: 'getAllProjects'
})
},
mounted() {
console.log("mounted this.projects", this.projects);
// add something from this.projects to this.runningprojects
},
methods: {
calcReq() {
...
},
...
}
</script>
In my Dashboard component (parent) I fetch the user data with a vuex action dispatch('user/getUser) and after that I fetch the projects of this user dispatch('project/getProject).
In my Overview component (child) I want to show the project information of this user. I call my mapGetters and I have a component variable runningprojects inside data(). In my mounted() lifecycle I want to push data from my getters to this data array.
The following problem is given:
When I refresh my application, the console.log from my child component mounted() is called before the dispatch jobs are finished in the parent component (dashboard).
It only works if change something in my local files and vue-cli does a live reload.
Because of the page lifecycle of the vue app. when component renders mounted is called after created and it wont wait for the ajax or any async calls.
One solution would be to not render the child component until the async return
<template>
<div id="dashboard">
<Header />
<b-container>
<div>
<b-row>
<b-col>
<Overview v-if="finished"/>
</b-col>
</b-row>
</div>
</b-container>
</div>
</template>
<script>
import Header from '#/components/common/Header';
import Overview from '#/components/dashboard/Overview';
import { mapGetters } from 'vuex';
export default {
name: 'dashboard',
data() {
return {
finished: false,
}
},
components: {
Header,
Overview
},
mounted() {
const sessionId = this.$cookie.get('connect.sid');
this.$store.dispatch('user/getUser', sessionId).then((userData) => {
this.$store.dispatch('project/getProject', userData.data.user);
this.finished = true;
});
},
computed: {
...mapGetters('user', {
user: 'getUser'
})
}
}
</script>
Just add a v-if in the child component and when dispatch has return then set the value to true which will render the child component and the then the mounted will have the values you want
Other solution would be.
Use updated function instead of mounted and which will be called when ever there is a change in the state.
I have this code in file app.vue :
<template>
<div id="app">
<button v-on:click="component = 'login'">aa</button>
<component v-bind:is="component"></component>
</div>
</template>
<script>
import acceuil from './components/acceuil.vue'
import login from './components/login.vue'
export default {
name: 'app',
components: {
acceuil,
login
},
data(){
return {
component: 'acceuil'
}
}
}
</script>
How can I toggle between acceuil/login in component from a different vue file ?
You need to pass the imported dependency (the object or the name of the component as a string) to v-bind:is. You can do this by returning it in a computed function and pass it to a computed property, which you then can use in the template.
<template>
<div id="app">
<button v-on:click="isLogin = true">Show Login</button>
<component v-bind:is="currentComponent"></component>
</div>
</template>
<script>
import acceuil from './components/acceuil.vue';
import login from './components/login.vue';
export default {
name: 'app',
data () {
return {
isLogin: false
};
},
computed: {
currentComponent () {
return this.isLogin ? login : acceuil;
}
},
};
</script>
See also the documentation of dynamic components in the official docs.
Is it possible to bind a prop to a function?
In my example below I’m trying to get a value from a function in the main App.vue and pass it as a prop to the child component customComponent.
e.g. (this example doesn’t work)
App.vue
import customComponent from ‘./custom-component.vue'
<template>
<custom-component
v-bind:myValue="geMyValue()"
></custom-component>
</template>
<script>
export default {
name: "Item",
methods: {
getMyValue: function() {
return 1+3;
}
}
}
</script>
customComponent.vue
<template>
<h3 class="some-custom-layout">custom component</h3>
<input type="button" #click="sendMyValue()" />
</template>
<script>
export default {
name: “custom",
props: ['myValue']
methods: {
sendMyValue: function() {
console.log(this.myValue);
}
}
}
</script>
It's possible, but probably it would be better to use computed properties, if you are going to return value:
<template>
<custom-component
v-bind:myValue="myValue"
></custom-component>
</template>
<script>
export default {
name: "Item",
computed: {
myValue: function() {
return 1+3;
}
}
}
</script>
https://v2.vuejs.org/v2/guide/computed.html