I have some trouble with input binding and conditional rendering: e.g. if I select grade = 1, I want to show the date field. When I load the page, I get:
[Vue warn]: Property or method "grade" is not defined on the instance but referenced during render.
My form:
<form id="school">
<div class="form-group">
{!! Form::label('grade', 'Grade') !!}
{!! Form::select('grade', $grades, null, ['v-model' => 'grade']) !!}
</div>
<div class="form-group" v-show="grade == 1">
{!! Form::label('date', 'Date') !!}
{!! Form::date('date', null,) !!}
</div>
</form>
Vue instance:
<script src="/js/app.js"></script>
<script>
new Vue({
el: '#school',
data: {
grade: 1
}
});
</script>
What am I missing here? I am new to Vue and really want to learn more!
Edit:
When I look to the source code of my browser, I see that the v-model attribute has disappeared. E.g.: when I write <input type="text" name="test" v-model="test">, I see <input type="text" name="test">
Found the answer here
So Laravel comes with a Vue instance..
Related
I'm building a form in Laravel's Blade syntax, and using AlpineJs for some interactivity stuff like showing and hiding content.
My code is here:
<div class="flex items-center" x-data="destinationBuilder">
<x-label required="true" class="mr-5">Destination:</x-label>
<x-basic-input #change="handleDestinationChange" ::value="destination" placeholder="https://google.com"/>
<x-buttons.primary class="ml-5" #check="validateDestination">Check</x-buttons.primary>
</div>
<div class="mt-4">
<button type="button"
class="p-5 w-full text-sm grid grid-cols-[min-content_min-content_auto_min-content] items-center gap-x-3 font-light text-gray-400 hover:bg-gray-300 rounded-full"
#click.camel="toggleAdvancedOptions">
<i class="lni lni-cog"></i>
<span class="whitespace-nowrap">Advanced options</span>
<div class="h-px w-full bg-gray-400"></div>
<i class="lni lni-chevron-down"></i>
</button>
<div x-show="advanced" x-transition x-cloak>
{{-- <x-links.get-parameter-form/>--}}
</div>
</div>
#push('footer-scripts')
<script>
document.addEventListener('alpine:init', () => {
Alpine.data('destinationBuilder', () => ({
destination: '',
advanced: false,
handleDestinationChange() {
if (this.validateDestination()) {
// emit constructed destination up
}
},
validateDestination() {
// check url is in a legit form (with https)
// basic is just url input
// advanced dropdown with get parameters, fragment, http protocol and port
},
toggleAdvancedOptions() {
this.advanced = !this.advanced;
}
}));
})
</script>
#endpush
I'm using a property named advanced to bind to x-show for another component.
When I look in my browser I get the following message: app.js:434 Uncaught ReferenceError: advanced is not defined
I'm not sure if this is due to a weird collision with blade or if I'm missing something fundamental with Alpinejs. I tried renaming the variable to showAdvanced but that didn't work either. I would expect advanced to be recognised as a property and bind to x-show as expected. What am I doing wrong here?
You have the following HTML structure:
<div x-data="destinationBuilder">
...
</div>
<div>
<div x-show="advanced">
...
</div>
</div>
As you see, the second div is not a child element of the first one where the x-data is defined, so it's outside of the scope of destinationBuilder component. Just create a common div (or similar) element that embeds both divs and apply the component x-data there, so each div will have access to the component's scope.
In Vue3, inline-templates were depreciated and now slots are used. Is it possible to have 2-way binding of variables for Vuejs components written in blade templates?
I want to have 2-way binding for Vue components that's written inline with blade templates. Although I know I can pass data like <example-component name="Hello World"> It is a ton of work to add props everywhere.
Vue recommends using slots as a inline-template replacement since it got removed in v3, however, that documentation makes no sense. I've got the components displayed using the code below. It's a dead simple text field + paragraph to display the name.
home.blade.php (Removed unnecessary HTML for brevity)
<div>
<h1>Dashboard</h1>
<example-component>
<div class="container">
<input v-model="name" placeholder="Change Name"/>
<p> Name is #{{ name }} </p>
</div>
</example-component>
</div>
example-component.vue
<template>
<div>
<slot></slot>
</div>
</template>
<script>
export default {
data() {
return {
name: 'hi',
}
}
}
</script>
Unfortunately, this does not work, the name doesn't start as 'hi' and doesn't update when changing the textfield. When I try something like <slot :name=name></slot>. Which I believe would pass the name into the slots section, the component gets rendered for a second before disappearing.
Is having 2-way binding with vue variables in blade templates even possible? Any help is appreciated.
Vue: 3.0.5
Laravel: 8.29.0
Is there a reason you're storing the data in the child component? The reactivity design works by passing props down and emitting events up, even though (unfortunately) the reactivity is not maintained when passing a variable up to the parent component. Seems a little counter intuitive, but I might be missing something in what you're trying to create.
It will, however, work if you put the data into the app instead of the component.
// app
const app = Vue.createApp({
data() {
return {
name: 'hi',
}
}
})
// component
app.component('example-component', {
template: `
<div>
<slot></slot>
</div>`,
})
app.mount("#app");
<script src="https://unpkg.com/vue#3.0.5/dist/vue.global.prod.js"></script>
<div id="app">
<h1>Dashboard</h1>
<example-component>
<div class="container">
<input v-model="name" placeholder="Change Name"/>
<p> Name is #{{ name }} </p>
</div>
</example-component>
</div>
<!--
I am using Laravel and Vue.
When I was searching on the internet I saw the following code.
<template>
<div>
<h3 class="text-center">Create Movie</h3>
<div class="row">
<div class="col-md-6">
<form #submit.prevent="createMovie">
<div class="form-group">
<label>Name</label>
<input type="text" class="form-control" v-model="movie.name">
</div>
<div class="form-group">
<label>Director</label>
<input type="text" class="form-control" v-model="movie.director">
</div>
<button type="submit" class="btn btn-primary">Create movie</button>
</form>
</div>
</div>
</div>
</template>
<script>
export default {
data() {
return {
movie: {}
}
},
methods: {
createMovie() {
this.axios
.post('http://localhost:8000/api/movie/create', this.movie)
.then(response => (
this.$router.push({name: 'movie'})
))
.catch(error => console.log(error))
.finally(() => this.loading = false)
}
}
}
I am trying to find out what the last line
.finally(() => this.loading = false)
is doing. I am searching on the internet but I can't find what it does. Also, I tried running the code without the last line however, it did not make any change.
Can someone please tell me what this is doing and when it is useful?
Without seeing the associated Vue template we cannot explain what it is doing exactly, however, we can be fairly confident that the value of loading will be used to show/hide some sort of overlay or activity spinner.
The purpose of the overlay/activity spinner is to provide visual feedback to the user that something is happening. This is useful when loading large amounts of data into your page, or when you perform a long running process (such as uploading a large file for example). So rather than the user seeing nothing on first page load, or clicking a button and wondering if it worked, they are provided with something to let them know that something is happening.
A basic example of what this might look like in the Vue template could be:
// if the value of loading is true, show this
<div v-if="this.loading">Loading, please wait ...</div>
// otherwise show this
<div v-else>Other content</div>
Your example is setting the value of loading to false once a response has been received from your axios request. You would probably want to set the value of loading to true prior to making the request to show an overlay/activity spinner.
Uncaught (in promise) ReferenceError: ture is not defined
You have a typo, it should be true not ture.
Firstly I'm Laravel Spark and have successfully integrated into the mix installation so my js is being deployed into app.js already
I am getting errors when I setup a new component for a project;
blade file
#extends('spark::layouts.app')
#section('content')
<div class="container">
<!-- Application Dashboard -->
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading">Sprints</div>
<div class="panel-body">
<os-sprints></os-sprints>
<input type="text" v-model="newSprint">
<button #click="addSprint">add</button>
</div>
</div>
</div>
</div>
</div>
<template id="my-sprints">
<ul class="list-group">
<li class="list-group-item" v-for="sprint in sprintlist">
<a :href="'/sprints/' + sprint.id">#{{ sprint.title }} #{{ sprint.id }} </a>
</li>
</ul>
</template>
#endsection
and my js
Vue.component('os-sprints', {
template: '#my-sprints',
data() {
return {
sprintlist: [],
newSprint: ''
};
},
created() {
this.getSprints();
},
methods: {
getSprints() {
axios.get ('/api/team/sprints')
.then(response => {
this.sprintlist = response.data;
});
},
addSprint() {
alert("hit");
// this.sprintlist.push(this.newSprintname);
// this.newSprintname = '';
},
}
});
The errors I'm getting in console;
app.js:42229 [Vue warn]: Property or method "newSprint" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.
(found in <Root>)
warn # app.js:42229
app.js:42229 [Vue warn]: Property or method "addSprint" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.
(found in <Root>)
warn # app.js:42229
app.js:42229 [Vue warn]: Property or method "sprintlist" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.
(found in <Root>)
warn # app.js:42229
app.js:42229 [Vue warn]: Invalid handler for event "click": got undefined
I'm getting a sprintlist data fine but even without the text field and button I'm getting errors and my button method never hits.
Any feedback would be greatly appreciated
Chris!
This type of warning is usually caused by a variable not being defined yet. (I know, not very helpful). What I mean:
You passing a variable from one component A to another component B
While a variable is still being passed (have not reached the desired component B), component B is already being mounted
since a component B is already mounted, it is trying to use a variable that hasn't reached yet (ta da -> a warning)
Then a variable reached, Vuejs reacted and updated the view accordingly
This warning can be avoided by adding a v-if to an element or a wrapper
That's because you reference your data object properties and methods of a child component in parent component.
Move
<input type="text" v-model="newSprint">
<button #click="addSprint">add</button>
into your child component's template and you should be fine.
Ok I worked it out, I had tried to do what MatWaligora had suggested previously but the issue was I didn't realise I needed a single "parent" within the template. After I changed it to the below I got the functionality working. I'm still getting Vue warning messages as above but the page works.
<template id="my-sprints">
<div>
<ul class="list-group">
<li class="list-group-item" v-for="sprint in sprintlist">
<a :href="'/sprints/' + sprint.id">#{{ sprint.title }} #{{ sprint.id }} </a>
</li>
</ul>
<input type="text" id="sprinttext" v-model="newSprint">
<button #click="addSprint">add</button>
</div>
</template>
For me it was an extra closing tag in the loop.
<div v-for="(item, index) in items" :key="index">
<a :href="item.url">{{ item.name }} </a>
</div> // <- the issue
</div>
Double check all tags if other answers didn't help you.
I'm trying to get Vue components working in Laravel 5.3 and I want to pass data from my blade template to a Vue component.
But I'm getting an error and none of the answers I've found so far have worked.
I'm using the example component that comes with the fresh install. In my blade template I have:
<example :testinfo="someinfo"></example>
In my Example.vue I have:
<template>
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading">Example Component</div>
<div class="panel-body">
{{testinfo}} I'm an example component!
</div>
</div>
</div>
</div>
</div>
</template>
<script>
export default {
props: ['testinfo'],
mounted() {
console.log('Component ready.')
}
}
</script>
The Vue component does load, but it does not display the testinfo, and it generates this error message:
Property or method "someinfo" is not defined on the instance but
referenced during render. Make sure to declare reactive data
properties in the data option. (found in root instance)
referenced to your error ->
Property or method "someinfo" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option. (found in root instance)
it means that someinfo model is not declared from your vue parent. it should be wrapped in data { someinfo:null } and from there supply him data and pass it in your component example.
regarding passing with data from vue blade. you should called ajax from your vue method like
Vue new(){
data : { someinfo : null },
ready :function() / mounted() vue2
{
this.getSomeInfo();
}
methods : {
getSomeInfo : function(){
var self = this;
your ajax request here then
self .someinfo = (your ajax.response)
}
}
}
you need an sperate ajax call from controller to achieve to get your information from controller.
after ajax call success then time to put the response to your vue model then it will automatically pass to your components re actively because of two way binding.
The answer from Tony Fale wasn't exactly what I was looking for but it did give me a clue that helped me think of the answer.
In this code:
<example :testinfo="someinfo"></example>
I thought "someinfo" would just be treated as a string but Vue treats it as a JavaScript variable. Since someinfo isn't defined anywhere, it causes an error.
If instead I do:
<example :testinfo="{somekey: 'someinfo'}"></example>
and change Example.vue to:
<template>
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading">Example Component</div>
<div class="panel-body">
{{testinfo.somekey}} I'm an example component!
</div>
</div>
</div>
</div>
</div>
</template>
It works as expected.