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How to make a component in Laravel 8 ?
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This tutorial demonstrates how to create a simple HTML-based component in Laravel 8 using Blade. Laravel offers a library to construct HTML components, much like Angular or React, that can accept parameters through HTML attributes. These components can be used anywhere within our application and are independent of controller routes.

In Laravel, components begin with “x” followed by a kebab case name, and we can create a component using the artisan command “php artisan make:component HelloWorld“

Executing the above command will generate a HelloWorld component class in the App\View\Components directory, and the view path will be resources/views/components/HelloWorld directory.

We can then access this component in any view using “x-hello-world“

To help illustrate this, let’s walk through an example

Step 1: Create a component

I assume you know Laravel installation and basic configuration then we need to create a blade component using Laravel artisan command 

php artisan make:component HelloWorld

Above command will create two files one is class in app\View\Component and other one resources\views\component\hello-world.blade.php

<?php

namespace App\View\Components;

use Illuminate\View\Component;

class HelloWorld extends Component
{
    /**
     * Create a new component instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Get the view / contents that represent the component.
     *
     * @return \Illuminate\Contracts\View\View|\Closure|string
     */
    public function render()
    {
        return view('components.hello-world');
    }
}

And view

<div>
   This is Readerstacks Hello World Component
</div>

Step 2: Using component in other view

Now, lets create a simple view to use our newly created view in it.

<!DOCTYPE html>
<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">

        <title>Readerstacks Laravel 8 component example</title>

        <style>
            body {
                font-family: 'Nunito', sans-serif;
            }
        </style>
    </head>
    <body class="antialiased">
        This is a test for component page
        <x-hello-world></x-hello-world>
    </body>
</html>

Step 2: Create route

Here, we need to create route and we will calll the view to use our new blade component

<?php
use Illuminate\Support\Facades\Route;

Route::get('/component', function(){
    return view('testcomponent');
});

Now, Check our implementation by running the project 

php artisan serve

Screenshot :

Laravel component example

Passing data to component

We can also send string, object or any data type to our component using attributes. string can be passed directly as we do in normal html but variables are passed using : character prefix to the attribute for example

   @for($counter=0;$counter<=5;$counter++)
        <x-hello-world title="Readerstacks" :counter-value="$counter"></x-hello-world>
   @endfor

And then component class will have to new properties title and counter as below 

<?php

namespace App\View\Components;

use Illuminate\View\Component;

class HelloWorld extends Component
{
    public $title; // new property
    public $counterValue;// new property
 
    public function __construct($title,$counterValue) // injected here
    {
        $this->title=$title;
        $this->counterValue=$counterValue;
        
    }
    public function render()
    {
        return view('components.hello-world');
    }
}
Laravel component passing data

Component Attributes and Merge Attributes

Same as other html elements we can also pass attributes like class, id, name etc. to the custom Laravel component as below

  <x-hello-world title="Readerstacks" class='danger' id='myid'></x-hello-world>

Then in our component view we can access these properties using $attributes variable.

<div {{ $attributes }} >
   This is Readerstacks Hello World Component
</div>

Merging attributes in Laravel component

Merging attributes mean we can add additional value to default passed attributes to the element as below.

  <x-hello-world title="Readerstacks" class='danger' id='myid'></x-hello-world>

and in component html

<div {{ $attributes->merge(["class"=>"alert "]) }} >
   This is Readerstacks Hello World Component
</div>

Output will be 

<div class="alert danger">
    This is Readerstacks Hello World Component
</div>

How to insert html as child in component?

Now, we have learn about using the component , passing data, attributes. Sometime we wanted to add some html as a child in our component as below

<x-hello-world title="Readerstacks" class='danger' id='myid'>
<span>My Child </span>
</x-hello-world>

So to render this child html we use slots , slots are used to place the inner html of any component into component html view. Child elements can be place in component view by echoing $slot

<div class="alert danger">
   This is Readerstacks Hello World Component
   <div class="msg">
     {{ $slot }}
   </div>
</div>

Named slot in component

Named slots are used to define multiple slot in a component what if we wanted to use multiple slot in different location in our component . It’s also known as Scoped slot 

<x-hello-world title="Readerstacks" :counter-value="$counter">
                <x-slot name='msg'>
                        <div class='msg'>Wow!</div>
                </x-slot>
                <x-slot name='anotherslot'>
                        Wow! i am another slot
                </x-slot>
</x-hello-world>

And in our component html

<div>
   This is Readerstacks Hello World Component and Dynamic Title is {{$title}} and counter {{$counterValue}} 
   {{$msg}}
   <h3 class="slot3">
    {{$anotherslot}}
   </h3>
 
</div>

As we can see in above example we can directly access our slots in html without defining in component class.

And Output:

Multiple slot in Laravel component

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