I want to add a v-model on a component but I got this warning:
[Vue warn]: Component emitted event "input" but it is neither declared in the emits option nor as an "onInput" prop.
Here is my code:
// Parent.vue
<template>
<h2>V-Model Parent</h2>
<Child v-model="name" label="Name" />
<p>{{ name }}</p>
</template>
<script setup>
import { ref } from 'vue'
import Child from './Child.vue'
const name = ref('')
</script>
// Child.vue
<template>
<input
class="input"
type="text"
:placeholder="props.label"
:value="props.value"
v-on:input="updateValue($event.target.value)"
/>
</template>
<script setup>
import { defineProps, defineEmit } from 'vue'
const props = defineProps({
label: String,
value: String
})
const emit = defineEmit('input')
function updateValue(value) {
emit('input', value)
}
</script>
I was trying to reproduce this tutorial but I'am stuck and got no idea what I am missing.
I want to display {{ name }} in the Parent.vue component. Do you got an idea how to solve this?
In vue 3 value prop has been changed to modelValue and the emitted event input to update:modelValue:
// Child.vue
<template>
<input
class="input"
type="text"
:placeholder="props.label"
:value="props.modelValue"
v-on:input="updateValue($event.target.value)"
/>
</template>
<script setup>
const props = defineProps({
modelValue: String
})
const emit = defineEmits(['update:modelValue'])
function updateValue(value) {
emit('update:modelValue', value)
}
</script>
I like to use with computed as well
<template>
<div>
<input v-model="model">
</div>
</template>
<script setup>
import { computed } from 'vue'
const props = defineProps({
modelValue: {
type: [String, Number],
default: ''
}
})
const emit = defineEmits(['update:modelValue'])
const model = computed({
get () {
return props.modelValue
},
set (value) {
return emit('update:modelValue', value)
}
})
</script>
I have the similar issues and finally I got it work. Here are one solution for one or multiple checkbox for Vue 3 and TypeScript.
ref: https://v2.vuejs.org/v2/guide/forms.html?redirect=true#Checkbox
solution : for one or multiple checkbox
CheckBox Component:
<template>
<input
type="checkbox"
:value="inputValue"
:disabled="isDisabled"
v-model="model"
:class="[defaultClass, inputClass, checkboxClass]"
/>
</template>
<script lang="ts">
import { defineComponent, PropType } from 'vue';
export default defineComponent({
components: {},
props: {
inputValue: {
type: String,
required: false,
default: '',
},
modelValue: {
type: [Object, Boolean] as PropType<String[] | Boolean>,
required: false,
default: (() => ({})) || false,
},
isDisabled: {
type: Boolean,
required: false,
default: false,
},
checkboxClass: {
type: String,
required: false,
default: '',
},
},
data() {
return {
defaultClass: 'h-4 w-4 rounded text-primary shadow-sm',
};
},
emits: ['update:modelValue'],
computed: {
model: {
get() {
return this.modelValue;
},
set(value) {
this.$emit('update:modelValue', value);
},
},
inputClass() {
if (this.isDisabled) {
return 'bg-dark-17 border-dark-13';
}
return 'bg-dark-23 border-dark-10 hover:bg-dark-25 focus:border-primary';
},
},
});
</script>
import CheckBox and use it
import CheckBox in other components;
<div>
<div v-for="(option, index) in options" :key="index">
<div
class="flex items-center justify-between p-6 py-4 border-b border-b-dark-13"
>
<div class="w-10">
<Checkbox :inputValue="option.name" v-model="selectedOptions" />
</div>
</div>
</div>
</div>
data() {
return {
selectedOptions: [],
};
},
Related
I am creating a custom input component using Vue 3. I'm trying to make the value of parent's data change when the value of input changes, but it doesn't work as intended.
Code :
CustomInput.vue
<template>
<input :type="type" :value="value" #input="onChange" />
</template>
<script lang="ts">
import { defineComponent } from "vue";
export default defineComponent({
name: "custom-input",
props: {
type: String,
value: String,
},
methods: {
onChange(event: Event) {
const target = event.target as HTMLInputElement;
this.$emit("input", target.value);
},
},
});
</script>
Form.vue
<template>
<form #submit.prevent="onsubmit">
<h2>Bucket Login</h2>
<CustomInput type="text" :value="id" v-model="id" placeholder="ID" />
<CustomInput
type="password"
:value="password"
v-model="password"
placeholder="PASSWORD"
/>
<CustomButton>Login</CustomButton>
<p #click="moveJoin">Join</p>
</form>
</template>
<script lang="ts">
import { defineComponent } from "vue";
import CustomButton from "./CustomButton.vue";
import CustomInput from "./CustomInput.vue";
export default defineComponent({
name: "login-form",
components: {
CustomButton,
CustomInput,
},
data: () => ({
id: "",
password: "",
}),
methods: {
onsubmit() {
console.log(this.id); // result => undefined
},
moveJoin() {
this.$router.push("/join");
},
},
});
</script>
If you execute onSubmit after entering a value in customInput, the value of this.id is undefined.
I have this component:
<template>
<div class="hello">
<div>
My prop: {{ myprop }}?
</div>
<div>
<button class="fas fa-lock-open lock" #click="changeText()">Click</button>
</div>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue'
export default defineComponent({
name: 'StartPage',
props: {
myprop: {
type: String
}
},
model: {
prop: 'myprop',
event: 'click'
},
methods: {
changeText () {
this.$emit('click', 'sometext')
console.log('this.myprop', this.myprop)
}
}
})
</script>
Im using vue v3. Everytime I click on the button, I still see the text "My prop: ?" in the browser.
And in the console I can see: "this.myprop undefined" every time I click on the button.
What am I doing wrong?
As per my understanding, You are trying to update the prop text on click of button from the child component. If Yes, you can achieve it simply by emitting a new text and updating that in the parent component.
Live Demo :
const ShowPropText = {
template: `<div class="hello">
<div>
My prop: {{ myprop }}
</div>
<div>
<button class="fas fa-lock-open lock" #click="changeText()">Click</button>
</div>
</div>`,
props: ['myprop'],
methods: {
changeText() {
this.$emit('click-event', 'sometext')
}
}
}
const app = Vue.createApp({
components: {
'show-prop-text': ShowPropText
},
data() {
return {
text: 'This is default text'
}
},
methods: {
methodCall(e) {
this.text = e;
}
}
})
app.mount('#app')
<script src="https://cdn.jsdelivr.net/npm/vue#next"></script>
<div id="app">
<show-prop-text :myprop="text" #click-event="methodCall"></show-prop-text>
</div>
I have configured mitt as a global event bus in my main.js:
import { createApp } from "vue";
import App from './App.vue'
import mitt from "mitt";
const emitter = mitt();
const app = createApp(App);
app.config.globalProperties.emitter = emitter;
app.mount("#app");
And I'm publishing an event using the event-bus from the child component as follows:
<template>
<div class= "combobox">
<label for={{selector_name}}>
<p>{{ selector_title }}</p>
</label>
<select :name="selector_name" :id="selector_id" :disabled="disabled" #change="onChange">
<option v-for="(opt, index) in selector_options" :key="`opt ${index}`">
{{ opt }}
</option>
</select>
</div>
</template>
<script>
export default {
name: 'ComboBox',
data() {
return {
disabled: false,
};
},
props: {
selector_title: {
type: String,
required: true
},
selector_name: {
type: String,
required: true
},
selector_id: {
type: String,
default: "combobox"
},
selector_options: {
type: Array,
required: true
},
},
methods: {
onChange(event){
this.emitter.emit('lock-combobox', { id: this.selector_id });
},
},
}
</script>
Then I try to subscribe to the event in the parent component as follows:
<template>
<div id="controls" class="param">
<div class="control" id="combobox1">
<ComboBox
selector_title = "Pattern"
selector_name = "pattern"
:selector_options="['complex', 'simple']"
selector_id="combo1"
ref="combo1"
/>
</div>
<div class="control" id="combobox2">
<ComboBox
selector_title = "Hand"
selector_name = "pattern"
:selector_options="['Left', 'Right']"
selector_id="combo2"
ref="combo2"
/>
</div>
<div class="control" id="speedslider">
<SpeedSlider/>
</div>
<div class="control" id="startstop">
<StartStopButton/>
</div>
<div class = control id="emergency">
<Emergency/>
</div>
</div>
</template>
<script>
import ComboBox from '../components/ComboBox.vue';
export default {
name: "Controls",
components: {
ComboBox,
},
created() {
this.emitter.on('lock-combobox', (event) => {
this.$refs.event.id.disabled = true;
});
},
}
</script>
But whenever I change the option in the Combobox, I get an error:
Uncaught TypeError: undefined has no properties
Can you please tell me how can I solve that? thanks in advance.
I want to create a formRow component that have a slot for the input field and vee-validate for validation
this is my markup
//form
<vFormRow validate="required" v-slot="{ onInput, errors }">
<vTextfield #input="onInput" :errors="errors"/>
</vFormRow>
I tried to emit the value to the parent and get the value with #input="onInput" on the slot, but this doesn't work
//formrow
<template>
<div class="mb-4">
<v-validation-provider
v-slot="{ errors }"
:rules="validate"
>
<label>{{ label }}</label>
<slot
:onInput="onInput"
:errors="errors"
/>
<vFormError
:message="errors[0]"
/>
</v-validation-provider>
</div>
</template>
<script>
import { ValidationProvider as vValidationProvider } from 'vee-validate'
import vRadioButton from '#primitives/textfield'
import vFormError from '#primitives/formError'
export default {
components: {
vTextfield,
vFormError,
vValidationProvider
},
props: {
value: {
type: String,
default: '',
},
validate: {
type: String,
required: true,
}
},
methods: {
onInput(value) {
console.log(value)
}
}
}
</script>
//textfield
<template>
<div>
<input :value="value" #input="onInput"/>
</div>
</template>
<script>
export default {
props: {
value: {
type: String,
default: '',
},
errors: {
type: Array,
default: () => {}
}
},
data: {
return {
// local_value: ''
}
}
methods: {
onInput(e) {
// this.local_value = e.target.value
this.$emit('input', e.target.value)
}
}
}
</script>
What I'm doing wrong?
You're not actually passing the slot props to <vTextfield>. I think you might be assuming that data bindings and event handlers on the <slot> are automatically applied to the slot's children, but that's not true.
To use the value slot prop, destructure it from v-slot, and bind it to the <vTextfield> child:
<vFormRow validate="required" v-slot="{ value }">
<vTextfield :value="value" />
</vFormRow>
You could also pass the onInput method as a slot prop:
// vFormRow.vue
<slot :onInput="onInput" />
Then bind the event handler to <vTextfield>:
<vFormRow validate="required" v-slot="{ onInput }">
<vTextfield #input="onInput" />
</vFormRow>
I am able to build a simple textbox component from <input /> and setup v-model binding correctly.
I'm trying to do same with a custom component: vs-input from vuesax.
Following the pattern below does not work as expected:
<template>
<div>
<vs-input type="text" v-model="value" #input="text_changed($event)" />
<!-- <input type="text" :value="value" #input="$emit('input', $event.target.value)" /> -->
</div>
</template>
<script>
export default {
name: 'TestField',
props: {
value: {
type: String,
default: ''
}
},
data() {
return {}
},
methods: {
text_changed(val) {
console.log(val)
// this.$emit('input', val)
}
}
}
</script>
In building custom components from other custom components is there anything particular we should look out for to get v-model binding working properly?
Following code might help you.(Sample code try it in codepen)
updating props inside a child component
//html
<script src="https://unpkg.com/vue"></script>
<div id="app">
<p>{{ message }}</p>
<input type="text" :value="test" #change="abc">
{{ test }}
</div>
//VUE CODE
new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!',
},
props:{
test:{
type:String,
default:''
}
},
methods:{
abc:function(event){
//console.log("abc");
console.log(event.target.value);
this.test=event.target.value;
}
}
})
I prefer to interface props with computed:
<template>
<div>
<vs-input type="text" v-model="cValue" />
</div>
</template>
<script>
export default {
name: 'TestField',
props: {
value: {
type: String,
default: ''
}
},
data() {
return {}
},
computed: {
cValue: {
get: function(){
return this.value;
},
set: function(val){
// do w/e
this.$emit('input', val)
}
}
}
}
</script>
Computed Setter