I have a simple form component:
<template>
<div>
<form #submit.prevent="addItem">
<input type="text" v-model="text">
<input type="hidden" v-model="id">
<input type="submit" value="enviar">
</form>
</div>
</template>
This component has a method that use $emit to add text item to a parent data:
addItem () {
const { text } = this
this.$emit('block', text)
},
Here is markup on my main file:
<template>
<div id="app">
<BlockForm #block="addBlock"/>
<Message v-bind:message="message"/>
</div>
</template>
And the script:
export default {
name: 'app',
components: {
BlockForm,
Message
},
data () {
return {
message : []
}
},
methods: {
addBlock (text) {
const { message } = this
const key = message.length
message.push({
name: text,
order: key
})
}
}
}
My question is: Message component list all items create by BlockForm component and stored inside message array. I add a edit button for each item inside Message list. How can I pass item text to be edited in BlockForm component?
You could just bind the input inside the BlockForm to a variable that is in the parent component. This way when you $emit from the child component, just add the value to the messages.
export default {
name: 'app',
components: {
BlockForm,
Message
},
data () {
return {
message : [],
inputVal: {
text: '',
id: ''
}
}
},
methods: {
addBlock () {
const key = this.message.length
this.message.push({
name: this.inputVal.text,
order: this.inputVal.text.length // If the logic is different here, you can just change it
})
this.inputVal = {
text: '',
id: ''
}
}
}
}
Now when you are calling the BlockForm,
<template>
<div id="app">
<BlockForm propVal="inputVal" #block="addBlock"/>
<Message v-bind:message="message"/>
</div>
</template>
and inside BlockForm,
<template>
<div>
<form #submit.prevent="addItem">
<input type="text" v-model="propVal.text">
<input type="hidden" v-model="probVal.id">
<input type="submit" value="enviar">
</form>
</div>
</template>
Now, when you press edit for existing message, simple assign that "Message" to inputVal data property mapping it to proper text and id.
Related
I have a parent form template and each question of the form is inside a child component, like this
<template>
<question1
#display-answer-1="setAnswer1"
/>
<!-- other child components here... -->
</template>
<script>
import Question1 from '...path...';
export default{
components: { Question1 },
data() {
answer1: ''
},
methods: {
setAnswer1(answer1) {
this.answer1 = answer1;
}
}
};
and my child component is like this
<template>
<input type="text" v-model="answer1"/>
<div>
<button
type="button"
#click="saveQ2"
>Save
</button>
</div>
</template>
<script>
export default {
data() {
return {
answer1: ''
};
},
methods: {
saveQ2() {
const answer1 = this.answer1;
this.$emit('display-answer-1', answer1);
}
}
};
This code works, but in this way I'm forced to put a button whenever there is a question to pass data from the child to the form template parent. Is there a smart alternative not to put a save button under each question?
you can use the blur event whenever an input gets unfocused it'll fire the event .
<template>
<input #blur="saveQ2" type="text" v-model="answer1"/>
</template>
<script>
export default {
data() {
return {
answer1: ''
};
},
methods: {
saveQ2() {
const answer1 = this.answer1;
this.$emit('display-answer-1', answer1);
}
}
};
I am making a file selection in the child component and once file is selected I want to pass the selected file to the parent component. I am not able to figure out how to do that. Please help out. If I try to get the print the value inside the onDocumentSelected(value) it comes out to be undefined.
Error message
Property or method "value" is not defined on the instance but referenced during render
Parent Component
<template>
<v-form :model='agency'>
<DocumentSelect
type="file"
ref="file"
:required="true"
name="vue-file-input"
#change="onDocumentSelected(value)"
/>
</v-form>
</template>
<script>
import DocumentSelect from 'views/document-selection.vue';
export default {
components: {
DocumentSelect
},
props: ['agency'],
methods: {
onDocumentSelected(value) {
console.log(value); //undefined
},
}
};
</script>
Child Component
<template>
<div class="input-group input-group--select primary--text" :class="{'input-group--required': required, 'input-group--error': hasError, 'error--text': hasError}" >
<div class="input-group__input">
<input
type="file"
name="name"
ref="file"
#change="onDocumentSelected" />
</div>
<div class="input-group__details">
<div class="input-group__messages input-group__error" v-for="error in errorBucket">
{{error}}
</div>
</div>
</div>
</template>
<script>
import Validatable from 'vuetify/es5/mixins/validatable.js'
export default {
mixins: [Validatable],
props: ['type', 'name', 'required'],
data: function () {
return {
inputValue: ''
};
},
watch: {
inputValue: function(value) {
this.validate();
console.log(value); // *Event {isTrusted: true, type: "change", target: input, currentTarget: null, eventPhase: 0, …}*
this.$emit('change', {value});
},
},
methods: {
onFileSelected(event) {
this.inputValue = event
},
},
};
</script>
Get rid of your watch method and move the logic inside onFileSelected:
#change="onFileSelected($event)"
onFileSelected(e) {
this.validate();
this.$emit('document-selected', e);
}
Then, in the parent, listen for the document-selected event:
<DocumentSelect
type="file"
ref="file"
:required="true"
name="vue-file-input"
#document-selected="onDocumentSelected($event)"
/>
You then have access to that value to do what you want with.
I want to search for elements using an input field within a form. I am passing a value from a component to another and the content changes but only after pressing enter. Is there a way to automatically update the list, after every new letter is typed?
Here is my code:
Parent(App):
<template>
<div id="app">
<Header v-on:phrase-search="passPhrase" />
</div>
</template>
<script>
import Header from ...
export default {
name: "App",
components: {
Header,
},
data() {
return {
posts: [],
searchedPhrase: ""
};
}
computed: {
filteredPosts() {
let temp_text = this.searchedPhrase;
temp_text.trim().toLowerCase();
return this.posts.filter(post => {
return post.name.toLowerCase().match(temp_text);
});
}
},
methods: {
passPhrase(phrase) {
this.searchedPhrase = phrase;
}
}
};
</script>
Child(Header):
<template>
<div class="child">
<p>Search:</p>
<form #submit.prevent="phrasePassed">
<input type="text" v-model="phrase" />
</form>
</div>
</template>
<script>
export default {
name: "search",
data() {
return {
phrase: ""
};
},
methods: {
phrasePassed() {
this.$emit("phrase-search", this.phrase);
}
}
};
</script>
passPhrase() brings the value from the child to the parent and then filteredPosts() find appropriate elements. I suspect that the form might be guilty of this issue but I do not know precisely how to get rid of it and still be able to pass the value to the parent.
Thanks
in the child you use submit event which called on enter. you should use #input on the input itself. and btw you didnt need even to declare pharse in the data because you didnt use it in the child. you just pass it up
you it like so
<template>
<div class="child">
<p>Search:</p>
<form>
<input type="text" #input="phrasePassed">
</form>
</div>
</template>
<script>
export default {
name: "search",
methods: {
phrasePassed(e) {
this.$emit("phrase-search", e.target.value);
}
}
};
</script>
I have two components, a parent and child one, the
parent data attribute I've set up it like this...
data () {
return {
users: [],
}
}
the users array is populated by a button click, i share this array with the child component.
The child component is trying to add a user to this list which works(adding value to passed in props), but because the users array is declared under data the parent component refreshes and i lose my users...
is there a pattern to keep the users array values and add to them via a child...
sorry if this is obvious but as i said i'm just starting...
edit : adding code (parent component)
<template>
<div id="app">
<div>
<button v-on:click="display()">Display users</button>
<button v-on:click="displaySingleUserInput =
!displaySingleUserInput">Add user</button>
<div>
</div>
<ul v-if="errors && errors.length">
<li v-for="error of errors">
{{error.message}}
</li>
</ul>
</div>
<add-user v-on:submit_user="addUser" v-show="displaySingleUserInput"></add-user>
<user-list v-bind:users="users"></user-list>
</div>
</template>
<script>
import axios from 'axios';
import UserList from './components/UserList';
import AddUser from './components/AddUser';
export default {
components: {
'user-list': UserList,
'add-user': AddUser
},
name: 'app',
data () {
return {
users: [],
errors: [],
displaySingleUserInput: false
}
},
methods: {
display: function(string)
{
axios.get(`users.json`)
.then(response => {
// JSON responses are automatically parsed.
this.users = response.data.users
})
.catch(e => {
this.errors.push(e)
})
},
addUser: function(id) {
this.users.push({firstname: "john", lastName: 'jones'})
},
}
}
</script>
child component
<template>
<div id="singleUserAdd">
<form id=addUser aria-label="single user add">
<button v-on:click="submit()">Submit</button>
<button>Cancel</button>
</form>
</div>
</template>
<script>
export default {
data() {
return {
}
},
methods: {
submit: function() {
this.$emit('submit_user', 1)
}
}
}
</script>
I assume that you have a method called addUser in your child component :
addUser(){
this.$emit("addusr",this.newuser);
}
In the parent one :
<child-comp #addusr="addNewUser" />
...
addNewUser(newuser){
this.users.push(newuser);
}
looks like i was missing
<form v-on:submit.prevent="onSubmit"
to stop my page from refreshing
I'm making a basic To Do app, where I have an input field and upon entering a task and pressing the "Enter" key the task appears in the list. Along with the task the TodoCard.vue component also generates a button, which I would like to use to delete the task.
I've added a #click="removeTodo" method to the button, but don't know where to place it, in the TodoCard component or in the App.vue file?
TodoCard component:
<template>
<div id="todo">
<h3>{{ todo.text }}</h3>
<button #click="removeTodo(todo)">Delete</button>
</div>
</template>
<script>
export default {
props: ['todo'],
methods: {
removeTodo: function (todo) {
this.todos.splice(this.todos.indexOf(todo), 1)
}
}
}
</script>
App.vue:
<template>
<div id="app">
<input class="new-todo"
placeholder="Enter a task and press enter."
v-model="newTodo"
#keyup.enter="addTodo">
<TodoCard v-for="(todo, key) in todos" :todo="todo" :key="key" />
</div>
</template>
<script>
import TodoCard from './components/TodoCard'
export default {
data () {
return {
todos: [],
newTodo: ''
}
},
components: {
TodoCard
},
methods: {
addTodo: function () {
// Store the input value in a variable
let inputValue = this.newTodo && this.newTodo.trim()
// Check to see if inputed value was entered
if (!inputValue) {
return
}
// Add the new task to the todos array
this.todos.push(
{
text: inputValue,
done: false
}
)
// Set input field to empty
this.newTodo = ''
}
}
}
</script>
Also is the code for deleting a task even correct?
You can send an event to your parent notifying the parent that the delete button is clicked in your child component.
You can check more of this in Vue's documentation.
And here's how your components should look like:
TodoCard.vue:
<template>
<div id="todo">
<h3>{{ todo.text }}</h3>
<button #click="removeTodo">Delete</button>
</div>
</template>
<script>
export default {
props: ['todo'],
methods: {
removeTodo: function (todo) {
this.$emit('remove')
}
}
}
</script>
App.vue:
<template>
<div id="app">
<input class="new-todo"
placeholder="Enter a task and press enter."
v-model="newTodo"
#keyup.enter="addTodo">
<TodoCard v-for="(todo, key) in todos" :todo="todo" :key="key" #remove="removeTodo(key)" />
</div>
</template>
<script>
import TodoCard from './components/TodoCard'
export default {
data () {
return {
todos: [],
newTodo: ''
}
},
components: {
TodoCard
},
methods: {
addTodo: function () {
// Store the input value in a variable
let inputValue = this.newTodo && this.newTodo.trim()
// Check to see if inputed value was entered
if (!inputValue) {
return
}
// Add the new task to the todos array
this.todos.push(
{
text: inputValue,
done: false
}
)
// Set input field to empty
this.newTodo = ''
}
},
removeTodo: function(key) {
this.todos.splice(key, 1);
}
}
</script>