How to create Infinite Scroll using Livewire and Js on a Laravel Project

Infinite scrolling is a web design technique that allows a webpage to load new content continuously as the user scrolls down the page, eliminating the need for pagination. This can enhance the user experience by allowing the user to view a larger amount of content without having to click through multiple pages.

One way to implement infinite scrolling on a Laravel project is by using the Livewire framework and the Intersection Observer API.

Livewire is a full-stack framework for Laravel that allows you to build modern, reactive, dynamic interfaces using PHP.

The Intersection Observer API is a JavaScript API that allows you to detect when an element enters or exits the viewport.

To get started, you'll need to have Livewire set up on your Laravel Project.

 composer require livewire/livewire

Then add ` @livewireStyles ` and ` @livewireScripts ` in your blade file.

 
...
    @livewireStyles
</head>
<body>
    ...
 
    @livewireScripts
</body>
</html>

Next, create a Livewire component to handle the infinite scrolling functionality. In your component's render method, you'll want to display a list of items and a loading indicator. The loading indicator will be shown when the component is in the process of loading more items.

public function render()
{
    return view('livewire.infinite-scroll');
}

And

<div>
    <ul>
        @foreach($items as $item)
            <li>{{ $item }}</li>
        @endforeach
    </ul>

    @if($loading)
        <div class="loading">Loading...</div>
    @endif
</div>

Next, you'll want to set up the Intersection Observer to detect when the loading indicator is in the viewport. When the loading indicator is in the viewport, you can trigger a Livewire action to load more items.

 document.addEventListener('DOMContentLoaded', () => {
    const observer = new IntersectionObserver(entries => {
        if (entries[0].isIntersecting) {
            @this.call('loadMoreItems')
        }
    });

    const loadingIndicator = document.querySelector('.loading');
    observer.observe(loadingIndicator);
});

Finally, in your Livewire component's loadMoreItems method, you'll want to retrieve the next batch of items and update the component's state.

public function loadMoreItems()
{
    $this->loading = true;

    $items = Item::paginate(10);

    $this->items = $this->items->merge($items);

    $this->loading = false;
}

With these steps, you should now have a working infinite scroll implementation using Livewire and the Intersection Observer API. You can customize the behavior further by adding additional logic or styling to the component as needed.