I want to switch between two single file component in vuejs, i don't how to use attach and detach functions
You can use the component which is a built in component provided by vue.
HTML
<div id="app">
<h3>Parent component</h3>
<button #click="current= 'ComponentA'">Show component A</button>
<button #click="current= 'ComponentB'">Show component B</button>
<component :is="current"></component>
</div>
script
const ComponentA ={
template:"<h4>This is component A</h4>"
}
const ComponentB ={
template:"<h4>This is component B</h4>"
}
new Vue({
el:'#app',
data:{
current: "ComponentA"
},
components:{
ComponentA,
ComponentB
},
})
Here is the fiddle
Related
Vue component hasn't onShow lifecycle method.
How to call a component method each time this component show in vue2?
I have used this library for that purpose before:
https://github.com/Akryum/vue-observe-visibility
I am assuming you are dynamically hiding and showing the component and you want to trigger few functionality every time component show. If Yes, You can simply achieve this requirement by using v-if directive instead of v-show. As v-if will rebuild the component every time condition got passed.
Live Demo :
Vue.component('child', {
props: ['childmsg'],
template: '<p>{{ childmsg }}</p>',
mounted() {
console.log('child component mounted');
}
});
var app = new Vue({
el: '#app',
data: {
buttonMsg: 'Show Child Component',
showChild: false
},
methods: {
toggleBtn() {
this.showChild = !this.showChild;
this.buttonMsg = this.showChild ? 'Hide Child Component' : 'Show Child Component';
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<button #click="toggleBtn">{{ buttonMsg }}</button>
<child v-if="showChild" childmsg="This is a child message"/>
</div>
I have been searching for a simple solution to generate components in a Vue 3 app programmatically. So far, I've used defineComponent to extend the div component and attach it to the main component via createApp and mount:
Main Component
<template>
<button type="button" v-on:click="addDiv"></button>
<div id="app-main">
</div>
</template>
<script>
import {defineComponent, createApp} from 'vue'
import Div from './components/Div.vue'
export default{
name: 'App',
methods: {
addDiv: () => {
let newDiv = defineComponent({extends: Div});
createApp(newDiv).mount("#app-main");
}
}
}
</script>
Div Component:
<template>
<div>This is a div</div>
</template>
<script>
export default {
name: 'Div'
}
</script>
My issue with this is that mount replaces everything in the target element. If you click the button 3 times, only 1 div appears instead of 3. I need a method where the code appends the component as a child in the target element allowing me to create as many div components as I want. Thanks in advance!
Don't use mount as that is designed to mount a new Vue instance. What you want to use is the <component :is="component_name"> feature and possibly have an array or other data structure containing the list of components you wish to have rendered.
For instance, consider the following simple example:
Vue.component('my-component', {
// component config goes here, omitting for simplicity.
});
new Vue({
el: '#app',
data: {
elements: []
},
methods: {
addNewDiv() {
this.elements.push({type: 'my-component'});
}
}
});
<div id="app">
<component v-for="element in elements" :is="element.type"></component>
</div>
This will iterate over the elements array dynamically and will replace each instance of the <component> tag with whatever is defined by the array element.
I'm having problems with a named slot. This seems like it should work. In the code below I'm trying to use a named slot "sidebar". I would expect my sidebar slot content to show up between the Sidebar starts and Sidebar ends text but nothing shows up in that slot. Everything renders in the main slot.
Here's my code.
route...
{
path: "/test",
name: "test",
meta: {
layout: "test-layout"
},
component: () =>
import("#/pages/Test.vue")
},
and App.vue template...
<template>
<div id="app">
<component :is="layout">
<router-view />
</component>
</div>
</template>
and test-layout...
<template>
<div>
<div>
<h1>Sidebar starts</h1>
<slot name="sidebar"/>
<h1>Sidebar ends</h1>
</div>
<div class="container">
<h1>Content starts</h1>
<slot/>
<h1>Content ends</h1>
</div>
</div>
</template>
and page Test.vue...
<template>
<test-layout>
<span slot="sidebar">sidebar slot content {{forecast.todaySummary}}</span>
<div>main slot content {{forecast.currentSummary}}</div>
</test-layout>
</template>
<script>
import api from "#/js/web-services";
export default {
data() {
return {
forecast: null
};
},
created() {
api.getDailyForecast().then(response => {
this.forecast = response.data;
});
}
};
</script>
and the import in my main.js
import TestLayout from "./layouts/test-layout.vue";
Vue.component('test-layout', TestLayout);
Why isn't my sidebar slot working?
UPDATE
If I get rid of the two lines in main.js and add
import TestLayout from "#/layouts/test-layout.vue";
and
export default {
components: { TestLayout },
data() {...
to Test.vue then it works.
In your router file you are using layout: "test-layout" this means what ever comes in your vue component will be rendered in base test-layout.
There are two ways as far as I know to render the layouts.
Do not define layout in router file and on parent component define named slots like this<slot #header></slot><slot #body></slot> then every slot will be rendered within this (test-layout) layout, and then in your each component extend like this <test-layout><template header>Header content</template><template body>Body content</template></test-layout>.
Defining layout in router file like you did, you can not further use in slots in that layout, you can just import other components e.g <template><Component1><Component2> </template>
I'm experiencing a problem where a custom event (swap-components) emitted from a dynamic component (A.vue or B.vue) is not being listened to correctly in the parent of the dynamic component (HelloWorld.vue).
Here is the source on GitHub (created using vue cli 3).
Here is a live demo showing the problem.
In the live demo, you'll see that clicking the button in the dynamic component with background color DOES NOT change the dynamic component. But when clicking the button below the background color (which originates in the HelloWorld.vue parent), the dynamic component DOES INDEED change.
Why is this happening and how to fix it?
Below I'll copy over the contents of the 3 main files of interest into this post:
HelloWorld.vue (the parent)
A.vue (sub component used in dynamic component)
B.vue (sub component used in dynamic component)
HelloWorld.vue:
<template>
<div>
<h1>The dynamic components ⤵️</h1>
<component
:is="current"
v-bind="dynamicProps"
></component>
<button
#click="click"
>Click me to swap components from within the parent of the dynamic component</button>
</div>
</template>
<script>
import A from "./A.vue";
import B from "./B.vue";
export default {
data() {
return {
current: "A"
};
},
computed: {
dynamicProps() {
return this.current === "A" ? { data: 11 } : { color: "black" };
}
},
methods: {
click() {
this.$emit("swap-components");
},
swapComponents() {
this.current = this.current === "A" ? "B" : "A";
}
},
mounted() {
this.$nextTick(() => {
// Code that will run only after the
// entire view has been rendered
this.$on("swap-components", this.swapComponents);
});
},
components: {
A,
B
},
props: {
msg: String
}
};
</script>
A.vue:
<template>
<section id="A">
<h1>Component A</h1>
<p>Data prop sent from parent: "{{ data }}"</p>
<button #click="click">Click me to swap components from within the dynamic component</button>
</section>
</template>
<script>
export default {
props: ["data"],
methods: {
click() {
this.$emit("swap-components");
}
}
};
</script>
B.vue:
<template>
<section id="B">
<h1>Component B</h1>
<p>Color prop sent from parent: "{{ color }}"</p>
<button #click="click">Click me to swap components from within the dynamic component</button>
</section>
</template>
<script>
export default {
props: ["color"],
methods: {
click() {
this.$emit("swap-components");
}
}
};
</script>
I'm guessing this is because the event listener is listening for a swap-components event emitted by the parent component itself. Perhaps you can fix that by listening for a swap-components event from the child component then emitting an event on the parent component.
<template>
<div>
<h1>The dynamic components ⤵️</h1>
<component
:is="current"
v-bind="dynamicProps"
#swap-components="$emit('swap-components')"
></component>
<button
#click="click"
>Click me to swap components from within the parent of the dynamic component</button>
</div>
</template>
Or you can call your method directly when the event is emitted by the child component ..
<template>
<div>
<h1>The dynamic components ⤵️</h1>
<component
:is="current"
v-bind="dynamicProps"
#swap-components="swapComponents"
></component>
<button
#click="click"
>Click me to swap components from within the parent of the dynamic component</button>
</div>
</template>
this is not bound to the context anymore when you use function. It is only limited to the function scope. Use arrow function to let this bound to the parent context.
Change:
this.$nextTick(function() {
With:
this.$nextTick(() => {
<template>
<div id="app">
<Loading></Loading>
<Content></Content>
</div>
</template>
<script>
import Loading from './Loading.vue'
import Content from './Content.vue'
export default {
name: 'App',
components: {
Loading,
Content
}
}
</script>
What is the best and elegant way to handle a loading component and remove it (or vue component or change styles) when all page is loaded?
I tried with v-cloack, but I think its not working beyond data stuff.
I tried with mounted, but doesn't seems to work.
v-cloak is to hide un-compiled mustache bindings until the Vue instance is ready. So you can use v-if to show/hide loading component.
var child1 = Vue.extend({
template: "<div>Loading...</div>"
});
var child2 = Vue.extend({
template: "<div>After Component loaded</div>",
});
var app = new Vue({
el: "#vue-instance",
data: {
loading: true
},
mounted() {
var vm = this;
setTimeout(function() {
vm.loading = false;
}, 1000);
},
components: {
child1,
child2
},
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.1/vue.js"></script>
<div id="vue-instance">
<child1 :name="name" v-if="loading"></child1>
<child2 :name="name" v-if="!loading"></child2>
</div>