I'm using Vue 3. In the example below I have 3 simple components, Name Component, Phone Component and Submit Component. How do I get in the respective properties of the Submit Component, what was entered in the inputs?
Name Component:
<template>
<div>
<input type="text" v-bind="name">
</div>
</template>
Phone Component:
<template>
<div>
<input type="text" v-bind="phone">
</div>
</template>
Submit Component:
<template>
<name></name>
<phone></phone>
</template>
<script>
export default {
data() {
return {
name: '',
phone: '',
}
}
}
</script>
<template>
<section>
<childComponent ref="nameOfRef" />
</section>
</template>
methods: {
submit() {
let Data = this.$refs.nameOfRef.$data; // nameOfRef.data or nameOfRef.$data or nameOfRef.phone or nameOfRef.name
}
},
Check I think it will help to catch your parent component data.
Related
how can I pass class attribute from parent to child component element?
Look here:
https://codesandbox.io/s/pedantic-shamir-1wuuv
I'm adding class to the Component "Input Field"
And my goal is that the 'custom-class' will be implemented on the 'input' element in the child component
But just still using the class attribute, and not setting a new prop like "customClass" and accept it in the props of the component
Thanks!
This depends on the template structure of your ChildComponent
Your Parent Component can look like this:
<div id="app">
<InputField class="anyClass" />
</div>
If your Child looks like this:
<template>
<input ... />
</template
Because if you have only 1 root Element in your template this will inherit the classes given automatically.
if your Template e.g. looks like this: (only available in vue3)
<template>
<input v-bind="$attrs" />
<span> hi </span>
</template
You will need the v-bind="$attrs" so Vue knows where to put the attributes to. Another Solution would be giving classes as props and assigning it to the element with :class="classes"
The pattern for the customs form component in Vue 2 where the props go to a child element looks something like this.
<template>
<div class="input-field">
<label v-if="label">{{ label }}</label>
<input
:value="value"
:class="inputClass"
#input="updateValue"
v-bind="$attrs"
v-on="listeners"
/>
</div>
</template>
<script>
export default {
inheritAttrs: false,
props: {
label: {
type: String,
default: "",
},
value: [String, Number],
inputClass: {
type: String,
default: "",
},
},
computed: {
listeners() {
return {
...this.$listeners,
input: this.updateValue,
};
},
},
methods: {
updateValue(event) {
this.$emit("input", event.target.value);
},
},
};
</script>
The usage of those components could look something like this.
```html
<template>
<div id="app">
<InputField
v-model="name"
label="What is your name?"
type="text"
class="custom"
inputClass="input-custom"
/>
<p>{{ name }}</p>
</div>
</template>
<script>
import InputField from "./components/InputField";
export default {
name: "App",
components: {
InputField,
},
data() {
return {
name: "",
};
},
};
</script>
A demo is available here
https://codesandbox.io/s/vue-2-custom-input-field-4vldv?file=/src/components/InputField.vue
You need to use vue props . Like this:
child component:
<template>
<div>
<input :class="className" type="text" value="Test" v-bind="$attrs" />
</div>
</template>
<script>
export default {
props:{
className:{
type:String,
default:'',
}
}
};
</script>
Parent component:
<div id="app">
<InputField :class-name="'custom-class'" />
</div>
Since you're using vue2 the v-bind=$attrs is being hooked to the root element of your component the <div> tag. Check the docs. You can put this wrapper on the parent element if you need it or just get rid of it.
Here is a working example
Another approach
There is also the idea of taking the classes from the parent and passing it to the child component with a ref after the component is mounted
Parent Element:
<template>
<div id="app">
<InputField class="custom-class" ref="inputField" />
</div>
</template>
<script>
import InputField from "./components/InputField";
export default {
name: "App",
components: {
InputField,
},
mounted() {
const inputField = this.$refs.inputField;
const classes = inputField.$el.getAttribute("class");
inputField.setClasses(classes);
},
};
</script>
Child Element:
<template>
<div>
<input type="text" value="Test" :class="classes" />
</div>
</template>
<script>
export default {
data() {
return {
classes: "",
};
},
methods: {
setClasses: function (classes) {
this.classes = classes;
},
},
};
</script>
Here a working example
In Vue2, the child's root element receives the classes.
If you need to pass them to a specific element of your child component, you can read those classes from the root and set them to a specific element.
Example of a vue child component:
<template>
<div ref="root">
<img ref="img" v-bind="$attrs" v-on="$listeners" :class="classes"/>
</div>
</template>
export default {
data() {
return {
classes: null,
}
},
mounted() {
this.classes = this.$refs.root.getAttribute("class")
this.$refs.root.removeAttribute("class")
},
}
Pretty much it.
I have a component in common between two other components A,B. This shared Comp has a button and its name changes depending on the component i use. How do I set the name dynamic?
I thought v-model solved the problem
What am I missing?
App.vue:
<test-a></test-a>
<test-b></test-b>
sharedComp.vue:
<template>
<div>
{{ btnValue }}
<input type="button" v-model="btnValue" />
</div>
</template>
<script>
export default {
data() {
return {
btnValue: "",
};
},
};
</script>
CompA.vue
<template>
<div>
<shared-comp
v-for="(item, index) in 3"
:key="index"
:value="'A'"
></shared-comp>
</div>
</template>
<script>
import SharedComp from "./SharedComp.vue";
export default {
components: { SharedComp },
};
</script>
CompB.vue
<template>
<div>
<shared-comp :value="'B'"></shared-comp>
</div>
</template>
<script>
import SharedComp from "./SharedComp.vue";
export default {
components: { SharedComp },
};
</script>
You have to define the properties you pass to your component inside of the 'sharedComp'.
Try something like:
<template>
<div>
{{ value }}
<input type="button" v-model="value" />
</div>
</template>
<script>
export default {
props: ['value'],
};
</script>
For further information on Props in Vue check the documentation page: https://v2.vuejs.org/v2/guide/components-props.html
After doing some digging, it seems that from child to parent you should update data by emitting events (not by v-model). This is my attempt of doing that (to no avail).
App.vue
<template>
<div>
<HelloWorld :count="count" #update:count="count= $event" />
</div>
</template>
<script>
import HelloWorld from "./components/HelloWorld.vue";
export default {
name: "App",
data() {
return {
count: 10
};
},
components: {
HelloWorld
}
};
</script>
HelloWorld.vue
<template>
<div class="hello">
<input
type="number"
min="0"
:value="count"
#input="$emit('input', $event.target.value)"
style="width:6em"
/>
</div>
</template>
<script>
export default {
name: "HelloWorld",
props: {
count: Number
}
};
</script>
Where am I going wrong? Ideally, I would like that changes in the input field of the child component would change the deposit field of the parent. Thanks!
I think that doesn't work because you're missing emits: ['update:count'] option in child component, But I recommend to name the prop as modelValue in child component and use v-model directive in parent instead of #update:count event :
<template>
<div>
<HelloWorld v-model="count" />
</div>
</template>
<script>
import HelloWorld from "./components/HelloWorld.vue";
export default {
name: "App",
data() {
return {
count: 10
};
},
components: {
HelloWorld
}
};
</script>
HelloWorld.vue :
<template>
<div class="hello">
<input
type="number"
min="0"
:value="count"
#input="$emit('update:modelValue', $event.target.value)"
style="width:6em"
/>
</div>
</template>
<script>
export default {
name: "HelloWorld",
props: {
modelValue: Number
},
emits: ['update:modelValue'],
};
</script>
This allows you to create a custom input
I know you can use v-model to bind a value to an input in the same component. How do you create a wrapper component for an input and bind a value to it?
Login.vue
<template>
<div id="Login">
<Input v-bind:value="email"/>
<Input v-bind:value="password"/>
</div>
</template>
<script>
import Input from './Input.vue'
import Button from './Button'
export default {
name: 'Login',
components: {
Input,
Button,
},
data: () => ({
email:'test',
password:'test',
}),
methods: {
login: () => { debugger; }, //this.email and this.password are still set to test
}
}
</script>
Input.vue
<template>
<div class="input>
<input v-model="value"/>
</div>
</template>
<script>
export default {
name: 'Input',
props: {
value: String,
},
}
</script>
Current set up results in
[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "value"
Is the only way to do this by emitting an event?
If I got it correctly, you can try to create transparent wrapper (in my case AppInput)
SomeParent.vue
<div>
<AppInput v-model="parentModel" />
</div>
AppInput.vue
<template>
<input
class="app-input"
v-bind="$attrs"
:value="value"
v-on="{
...$listeners,
input: event => $emit('input', event.target.value)
}">
</template>
<script>
export default {
name: "AppInput",
inheritAttrs: false,
props: ["value"]
};
</script>
one of articles
The best way is use v-model for wrapper and on/emit for input
<div id="Login">
<Input v-model="email"/>
<Input v-model="password"/>
</div>
...
<div class="input>
<input
v-bind:value="value"
v-on:input="$emit('input', $event.target.value)"
>
</div>
You can implement v-model directly in the input component by doing so.
<template>
<div class="input>
<input :value="value" #input="$emit('input', $event.target.value)"/>
</div>
</template>
<script>
export default {
name: 'Input',
props: ["value"]
}
</script>
And then use it in your parent component like this:
<template>
<div id="Login">
<Input v-model="email"/>
<Input v-model="password"/>
</div>
</template>
<script>
import Input from './Input.vue'
import Button from './Button'
export default {
name: 'Login',
components: {
Input,
Button,
},
data: () => ({
email:'test',
password:'test',
}),
methods: {
login: () => { debugger; }, //this.email and this.password are still set to test
}
}
</script>
See here
Good day,
I'm trying to pass a value from child to parent using the props but I'm having an error that says,
Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "search"
Here are my sample codes:
Parent component
<template>
<div>
<child :search="search" />
</div>
</template>
<script>
export default(){
data: ()=>({
search: ''
})
}
</script>
Child component
<template>
<div>
<input type="text" v-model="search" />
</div>
</template>
<script>
export default{
props: ['search']
watch:{
search(val){
this.$emit('search', val);
}
}
}
</script>
I hope somebody can help me.
You're binding v-model to search. So if you type into your input vue to mutates the property. And it's just a warning which says that the data will be lost on next update, because then the property will passed again and your last value will be overwritten.
You could do something like this:
Child:
<template>
<div>
<input type="text" v-model="search" />
</div>
</template>
<script>
export default{
mounted () {
this.searchForResult= this.search;
},
props: ['search'],
data() {
searchForResult: ''
},
watch:{
searchForResult(val){
this.$emit('search', val);
}
}
}
</script>
Parent:
<template>
<div>
<child :search="search" />
</div>
</template>
<script>
export default(){
data: ()=>({
search: ''
})
}
</script>
There is also the possibility to add a search method which you can call from parent.
Parent component
<template>
<div>
<div>received: {{childResult}}
<child :search="search" #change="change" />
</div>
</template>
<script>
export default(){
data(){
return {
search: 'some content',
childResult: ''
}
},
methods:{
change(data){
this.childResult = data;
}
}
}
</script>
Child component
<template>
<div>
<input type="text" v-model="result" />
</div>
</template>
<script>
export default{
props: {
search: String
},
data(){
return {
result: this.search
};
},
watch:{
result(val){
this.$emit('change', val);
}
}
}
</script>