Demo upload file lên với livewire : 

File blade

<div class="offset-3 col-6">
    <h1>Image Upload</h1>
    @if(session('success'))
    <div class="alert alert-success">{{session('success')}}</div>
    @endif
    @if($image)
    <img width="500" height="300" src="{{$image->temporaryUrl()}}"
        @endif
        <div class="mb-3">
    <input type="file" id="upload{{$id}}" wire:model="image" class="form-control">
    @error('image')
    <span class="text-danger">{{$message}}</span>
    @enderror

    <input type="date" name="published" id="published" wire:model="published" />
</div>
@if($image)
<button wire:click="resetImage" class="btn btn-secondary">Reset</button>
@endif
<button wire:click="save" class="btn btn-primary">Save</button>
</div>

File Xử lý :

<?php

namespace App\Livewire;

use App\Models\Image;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\Storage;
use Livewire\Attributes\On;
use Livewire\Component;
use Livewire\WithFileUploads;

class Imageupload extends Component
{
    use WithFileUploads;
    public $image;
    public $id = 1;
    public function render()
    {
        return view('livewire.imageupload');
    }
    function save()
    {
        $this->validate([
            'image' => 'required|mimes:jpeg,png,jpg,gif|max:4048'
        ]);
        $fileNameWithoutExtension = pathinfo($this->image->getClientOriginalName(), PATHINFO_FILENAME);
        $new_file = $this->setname_file($fileNameWithoutExtension, $this->image->getClientOriginalExtension());
        $status_image = Storage::disk('public')->putFileAs('uploads', $this->image, $new_file);
        Image::create(['image' => $status_image]);
        $this->dispatch('create_image');
        session()->flash('success', 'File Saved');
        //$this->redirect(route('image'));
        $this->reset();
    }

    function resetImage()
    {
        $this->reset('image');
        $this->id++;
        session()->flash('success', 'Image Reset');
    }
    protected function setname_file(string $fileName, string $type = 'xlsx'): string
    {
        $timestamp = Carbon::now()->format('Y_m_d_H_i_s');
        return $fileName . '_' . $timestamp . '.' . $type;
    }
}