Render slot as v-html (Vue 3) - vue.js

Goal
How to implement a component that renders an html string (eg fetched from a CMS) passed as a slot like this :
// app.vue
<script setup>
import MyComponent from "./MyComponent.vue"
const htmlStr = `not bold <b>bold</b>`
</script>
<template>
<MyComponent>{{htmlStr}}</MyComponent>
</template>
Explanation
To render an html string (eg fetch from a CMS) we can use v-html :
// app.vue
<script setup>
const htmlStr = `not bold <b>bold</b>`
</script>
<template>
<p v-html="htmlStr"></p>
</template>
Failed attempts
I have tried with no success :
// component.vue
<script>
import { h } from "vue";
export default {
setup(props, { slots }) {
return () =>
h("p", {
innerHTML: slots.default(),
});
},
};
</script>
Renders
[object Object]
Link to playground
Workaround with props
As a workaround, we can of course use props but it's verbose.
// app.vue
<template>
<MyComponent :value="htmlStr">{{htmlStr}}</MyComponent>
</template>
// component.vue
<template>
<p v-html="value"></p>
</template>
<script setup>
import { defineProps } from 'vue'
defineProps(['value'])
</script>

slots.default() returns an array of your passed slot elements, try to map that content and render it :
h("p", {
innerHTML: slots.default().map(el=>el.children).join(''),
});
Playground

Related

VueJS: Template Refs binding from slot props?

I have a component with a slot (SlotComponent) like this for example
<template>
<slot :element="element"></slot>
</template>
<script setup lang="ts">
import { onMounted, ref } from "vue";
const element = ref<HTMLElement | null>(null);
onMounted(() => console.log(element.value));
</script>
However I can't seems to bind the element within the slot when using the component. The element is null on the onMounted lifecycle callback (above snippet).
<SlotComponent v-slot="{ element }">
<div ref="element">hello world</div>
</SlotComponent>
Question: how can I bind to the html element inside the slot?
use Function Refs
provide a setElement() function as a slot prop
<template>
<slot :set-element="setElement"></slot>
</template>
<script setup lang="ts">
import { ref, watchEffect } from "vue";
const element = ref<Element | null>(null);
function setElement(el: Element) {
element.value = el;
}
watchEffect(() => {
console.log(element.value);
});
</script>
usage
<SlotComponent v-slot="{ setElement }">
<div :ref="(el) => setElement(el)">Hello World</div>
</SlotComponent>

Vue: How do I call a function inside a Component?

I am trying to execute a function from the Food.vue component from Page.vue.
How can I execute a function from an imported component?
I am using Vue 3 Composition API.
This is what I am trying to do:
Food.vue Component
<script setup>
var food = "blueberry"
function changeFood () {
food = "cherry";
}
</script>
<template>
<div>{{food}}</div>
</template>
Page.vue
<script setup>
import { onMounted } from "vue";
import food from "#/components/Food.vue";
onMounted(async() => {
// I want to execute changeFood() from the imported component. How can I do this?
});
</script>
<template>
<food></food>
</template>
I know this can be done with page props, but that's not what Im trying to do. I am trying to execute a function.
You have to expose the method to the parent using defineExpose;
Food.vue
<script setup>
import { ref } from "vue";
const food = ref("blueberry");
const changeFood = () => {
food.value = "cherry";
};
defineExpose({ changeFood });
</script>
<template>
<div>{{food}}</div>
</template>
Page.vue
<script setup>
import { ref, onMounted } from "vue";
import food from "#/components/Food.vue";
const myFood = ref(null);
onMounted(async() => {
if (myFood.value) {
myFood.value.changeFood();
}
});
</script>
<template>
<food ref="myFood" />
</template>
Demo

How to use template refs in Nuxt 3

In Nuxt2 there were template $refs that you could access in <script> with this.$refs
I would like to know what is the Nuxt3 equivalent of this is.
I need this to access the innerText of an element. I am not allowed to use querySelector or getElementById etc.
This is the way we write code. I can give html elements ref="fooBar" but I can't access it with this.$refs.fooBar or even this.$refs.
<script setup lang="ts">
import { ref, computed } from 'vue';
const foo = ref('bar');
function fooBar() {
//Do stuff
}
</script>
<template>
//Html here
</template>
With Options API
<script>
export default {
mounted() {
console.log('input', this.$refs['my-cool-div'])
}
}
</script>
<template>
<div ref="my-cool-div">
hello there
</div>
</template>
With Composition API
<script setup>
const myCoolDiv = ref(null)
const clickMe = () => console.log(myCoolDiv)
</script>
<template>
<button #click="clickMe">show me the ref</button>
<div ref="myCoolDiv">
hello there
</div>
</template>

Vue 3, $emit never firing

The documentation is not enough to be able to do the emit. I have seen many tutorials and nothing works, now I am testing this
Child component
<div #click="$emit('sendjob', Job )"></div>
With the Vue DevTools plugin I can see that the data is sent in the PayLoad, but I can't find a way to receive this emit from the other component.
Many people do this
Any other component
<template>
<div #sendjob="doSomething"></div>
</template>
<script>
export default {
methods:{
doSomething(){
console.log('It works')
}
}
}
</script>
In my case it doesn't work
You should import the child component in the parent component and use it instead of the regular div tag.
I'm sharing examples for your reference to achieve emits in Vue 3 using <script setup> and Composition API. I strongly suggest going with <script setup if you are going to use Composition API in Single File Component. However, the choice is yours.
Example with <script setup>: https://v3.vuejs.org/api/sfc-script-setup.html
<!-- App.vue -->
<template>
<UserDetail #user-detail-submitted="userDetailSubmitted"/>
</template>
<script setup>
import UserDetail from './components/UserDetail';
function userDetailSubmitted(name) {
console.log({ name })
}
</script>
<!-- UserDetail.vue -->
<template>
<input type="text" v-model="name" #keyup.enter="$emit('user-detail-submitted', name)" />
</template>
<script setup>
import { ref } from 'vue';
const name = ref('');
</script>
Example using Composition API: https://v3.vuejs.org/api/composition-api.html
<!-- App.vue -->
<template>
<UserDetail #user-detail-submitted="userDetailSubmitted"/>
</template>
<script>
import UserDetail from "./components/UserDetail";
export default {
components: {
UserDetail,
},
setup() {
function userDetailSubmitted(name) {
console.log({ name });
}
return {
userDetailSubmitted
}
},
};
</script>
<!-- UserDetail.vue -->
<template>
<input type="text" v-model="name" #keyup.enter="$emit('user-detail-submitted', name)" />
</template>
<script>
import { ref } from 'vue';
export default {
setup() {
const name = ref('');
return {
name,
}
}
}
</script>
You should import this child-component in the parent. And don't rename it to the html's original tag.vue3. You'd better use the Composition API.

How to pass vmodel property to child component in nuxjs

I can't seem to pass dynamically modified properties from layouts into the <Nuxt /> component.
This is my ~/layouts/default.vue
<template>
<div>
<input v-model="myprop" />
<span>{{myprop}}</span>
<Nuxt />
</div>
</template>
<script>
export default {
provide: function () {
return {myprop: this.myprop};
},
data: () => ({
myprop: 'hello galaxy',
}),
}
</script>
This is my ~/pages/index.vue
<template>
<div>My Prop is: {{myprop}}</div>
</template>
<script>
export default {
inject: ["myprop"]
}
</script>
On the web page I see hello galaxy printed 3 times, once in the input, once in a span, and once in the Nuxt component. But when I edit the input field, only the span is updated. The Nuxt component does not capture the changes in myprop. The Nuxt component continues to show only hello galaxy while put the input and span shows changes as I type on my keyboard
What am I doing wrong?
The provide/inject is useful for simple situation, but if you've some reactive stuff the vuex store is more convenient :
in store/index.js
add a state called search and its mutations and actions :
export const state=()=>({
search:''
})
export const mutations ={
SET_SEARCH(state,payload){
state.search=payload
}
}
export const actions ={
setSearch(context,payload){
context.commit('SET_SEARCH',payload) ​
}
}
in layout/default.vue add computed property with setter/getter bound to the store:
<template>
<div>
<input v-model="search" />
<span>{{search}}</span>
<Nuxt />
</div>
</template>
<script>
export default {
computed:{
search:{
get(){
return this.$store.state.search
},
set(val){
this.$store.dispatch('setSearch',val)
}
}
}
}
</script>
in pages/index.vue :
<template>
<div>My search is: {{search}}</div>
</template>
<script>
export default {
computed:{
search(){
return this.$store.state.search
}
}
}
</script>