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Trying to avoid mutating a prop that goes 3 levels deep by using $emit

EDIT: Here's a repo I made for easier parsing.
I have a Component that lists products in a datatable. The first column of the table is a link that shows a modal with a form of the product that was clicked (using its ID). I'm using the PrimeVue library for styling and components.
<template>
<Column field="id" headerStyle="width: 5%">
<template #body="slotProps">
<ProductForm :product="slotProps.data" :show="showModal(slotProps.data.id)" />
<a href="#" #click.stop="toggleModal(slotProps.data.id)">
<span class="pi pi-external-link"> </span>
</a>
</template>
</Column>
</template>
<script>
import ProductForm from "./forms/ProductForm";
export default {
data() {
return {
activeModal: 0,
}
},
components: { ProductForm },
methods: {
toggleModal: function (id) {
if (this.activeModal !== 0) {
this.activeModal = 0;
return false;
}
this.activeModal = id;
},
showModal: function (id) {
return this.activeModal === id;
},
},
</script>
The modal is actually a sub component of the ProductForm component (I made a template of the Modal so I could reuse it). So it's 3 components all together (ProductList -> ProductForm -> BaseModal). Here's the product form:
<template>
<div>
<BaseModal :show="show" :header="product.name">
<span class="p-float-label">
<InputText id="name" type="text" :value="product.name" />
<label for="name">Product</label>
</span>
</BaseModal>
</div>
</template>
<script>
import BaseModal from "../_modals/BaseModal";
export default {
props: ["product", "show"],
components: { BaseModal },
data() {
return {};
},
};
</script>
When the modal pops up it uses the ProductForm subcomponent. Here is the BaseModal component:
<template>
<div>
<Dialog :header="header" :visible.sync="show" :modal="true" :closable="true" #hide="doit">
<slot />
</Dialog>
</div>
</template>
<script>
export default {
props: {
show: Boolean,
header: String,
},
methods: {
doit: function () {
let currentShow = this.show;
this.$emit("showModel", currentShow)
},
},
data() {
return {
};
},
};
</script>
I'm passing the product object, and a show boolean that designates if the modal is visible or not from the first component (ProductList) all the way down through the ProductForm component and finally to the BaseModal component. The modal is a PrimeVue component called Dialog. The component actually has it's own property called "closable" which closes the modal with an X button when clicked, that is tied to an event called hide. Everything actually works. I can open the modal and close it. For some reason I have to click the another modal link twice before it opens after the initial.
The issue is when I close a modal, I get the Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "show" error. I've tried everything to emit to the event and change the original props value there, but the error persists (even from the code above) but I'm not sure if because I'm 3 components deep it won't work. I'm pretty new to using props and slots and $emit so I know I'm doing something wrong. I'm also new to laying out components this deep so I might not even be doing the entire layout correctly. What am I missing?

Well you are emitting the showModel event from BaseModal but you are not listening for it on the parent and forwarding it+listening on grandparent (ProductForm)
But the main problem is :visible.sync="show" in BaseModal. It is same as if you do :visible="show" #update:visible="show = $event" (docs). So when the Dialog is closed, PrimeVue emits update:visible event which is picked by BaseModal component (thanks to the .sync modifier) and causes the mutation of the show prop inside BaseModal and the error message...
Remember to never use prop value directly with v-model or .sync
To fix it, use the prop indirectly via a computed with the setter:
BaseModal
<template>
<div>
<Dialog :header="header" :visible.sync="computedVisible" :modal="true" :closable="true">
<slot />
</Dialog>
</div>
</template>
<script>
export default {
props: {
show: Boolean,
header: String,
},
computed: {
computedVisible: {
get() { return this.show },
set(value) { this.$emit('update:show', value) }
}
},
};
</script>
Now you can add same computed into your ProductForm component and change the template to <BaseModal :show.sync="computedVisible" :header="product.name"> (so when the ProductForm receives the update:show event, it will emit same event to it's parent - this is required as Vue event do not "bubble up" as for example DOM events, only immediate parent component receives the event)
Final step is to handle update:show in the ProductList:
<ProductForm :product="slotProps.data" :show="showModal(slotProps.data.id)" #update:show="toggleModal(slotProps.data.id)"/>

How to bind whole component in Vue.js?

I just want to ask how to bind whole component (for example div) in Vue.js. Is there anything like innerHTML? Here is example:
Parent.vue
<template>
<div id="parent">
//some elements
</div>
</template>
Child.vue
<template>
<div id="child">
//some different elements
</div>
</template>
Now how to innerHTML child in parent? I've tried something like v-html:component and then data(){ return{ component: and here I dont know how to pass whole vue Component like Child.vue div. Should I use refs or something?
Now I use visibility attribute from css and I change it but I don't think that is good way to do this.

If you want to switch between components, then check out VueJS dynamic components:
https://v2.vuejs.org/v2/guide/components.html#Dynamic-Components
You can use the component element and the :is prop to send down what component to render.
I have a working demo here: https://codepen.io/bergur/pen/bPEJdB
Imagine the following simple Vue component
Vue.component('menuList', {
data() {
return {
list: ['Menu item A', 'Menu item B']
}
},
template: `
<ul>
<li v-for="item in list">{{ item}}</li>
</ul>
`
})
This is a simple component rendering a unordered list of menu items. Lets create another similiar component that renders ordered list of products. Note that just to make them a little different, the menuList that has ul and the productList has ol
Vue.component('productList', {
data() {
return {
list: ['Product item A', 'Product item B']
}
},
template: `
<ol>
<li v-for="item in list">{{ item}}</li>
</ol>
`
})
Now we can create a main VueJS that renders these components depending on which button I press. You can have what ever trigger/action you want to change the component.
new Vue({
name: 'main',
el: '#main',
data() {
return {
header: 'Component switching',
selectedComponent: 'menuList'
}
},
methods: {
setComponent(name) {
this.selectedComponent = name
}
},
template: `<div>
<button #click="setComponent('menuList')">Menu List</button>
<button #click="setComponent('productList')">Products</button>
<component :is="selectedComponent" />
</div>`
})
So here the magic begins.
We create a app with some data properties. The header property is just a string value, and selectedComponent tells us which component is beeing rendered.
In our template we use the <component :is="selectedComponent /> so initially the menuList component is the active one.
We create a method called setComponent that takes in a string value and sets that as a new value for selectedComponent. By pressing a button a new value for selectedComponent is set and the component is rendered. Voila

Vuejs moving data between multiple components

I have a parent component with two children components that I need data to move between. I can get emitted data from one child (multiselect.vue) to the parent, but cannot get it to then move into the other child component (render.vue). I suspect it has something to with v-model. Below is a simplifed version.
Parent component
<template>
<div>
<multiSelect v-model="content" />
<renderSplashPage :content="render" />
</div>
</template>
<script>
import multiSelect from '#/utils/multiSelect'
import render from '#/components/Render'
export default {
components: {
multiSelect,
render,
},
name: 'somename',
data(){
return{
content: {},
render: {}
}
},
watch: {
'content': function(val) {
this.render = val;
},
},
}
</script>
How can I get the emitted data to be 'watched' and 'picked up' by the 'render' component?

render is a reserved name (i.e., the internal render function cannot be overwritten), and for some reason, Vue silently ignores attempts to modify it.
Rename your property (e.g., to "myRender"), and you should see reactivity. If myRender is always equal to content, you could actually just replace it with content in your binding:
<multiselect v-model="content" :options="options" />
<render :content="content" />
demo

I used a variation of this here to solve my issue:
this.someObject = Object.assign({}, this.someObject, { a: 1, b: 2 })
Taken from here:
https://v2.vuejs.org/v2/guide/reactivity.html

Bind dynamically value to component's props

I have defined custom component with props. when I using this component I need dynamically bind value to on of these props
In custom component's template I have defined element like this:
<template>
...
<div class="input-group-addon" v-show="currency">{{ currency }}</div>
...
</template>
and its prop:
export default {
...
props: {
currency: {
type: String
}
}
...
}
And component's usage in another component:
component's template
<custom-component currency="calculateCurrency" ></custom-component>
component's code
export default {
components: {custom-component},
data: () => ({
myProject: null // this is used as v-model in combo box
}),
computed: {
calculateCurrency: function() {
return myProject.currency; // currency is getter in object myProject
}
}
}
so in result I have something like this:
I also tried use
suffix=calculateCurrency
without quotes but didn't help. can you help me fix it please? Thanks

I believe you are missing a colon on the binding property:
<custom-component :currency="calculateCurrency" ></custom-component>
Adding that before "currency" will allow for data-binding

Use prop value as a variable in VueJS

I have a problem about using prop value as a variable in VueJS. I have a component which I tranmit prop:
This is parent component:
<template>
<div class="a">
<UploadAvatarModal
apiurl="upload_avatar"
id="UploadAvatarModal"
/>
</div>
</template>
This is script of UploadAvatarModal component:
<template>
<div class="a">
...
</div>
</template>
<script>
export default {
props: {
id: String,
apiurl: String
},
methods: {
def: function () {
this.$refs.id.hide()
}
}
}
</script>
In this line: this.$refs.id.hide() How can I call methods according to prop id. Example: this.$refs.UploadAvatarModal.hide() or this.$refs.UploadAvatarModal2.hide() changed by props value??

You can access props doing :
this.propName
To access id prop you need to do :
this.id
So the line you wrote this.$refs.id.hide() should be written :
this.$refs[this.id].hide()
But it will probably do nothing as .hide() is a jquery function.
In plain javascript you would need to do :
this.$refs[this.id].style.display = 'none'
That said, it's might not be a good idea to do so.
Using vue, the best way to show/hide a component is probably to use v-if or v-show