[Vuejs]-Inserted script is not working when I use laravel/ui

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I finally fixed it, it seemed to have problems with the way I was inserting my script code in my children view. I had to read about stacks (check https://laravel.com/docs/7.x/blade#stacks) which seems to be the right way to insert scripts in your parent view.

The parent view is the same as posted in the question, but I uncommented the script in the head, and put this befores closing body label:

@stack('script')

And my children view now looks like this (focus on the push and endpush part which is the script that had problems):

@extends('layouts.app')

@section('grid')
<!-- Bootstrap css -->
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<!-- Style css -->
<link rel="stylesheet" type="text/css" href="css/style.css">
@endsection

@push('script')

<script>
    x = document.getElementById("alertabien");
    y = document.getElementById("alertamal");
    x.style.display =  "none";
    y.style.display =  "none";
@foreach($productos as $product)
        document.getElementById('postForm{{$product->id}}').addEventListener('submit', prueba{{$product->id}});
        function prueba{{$product->id}}(e){
            e.preventDefault();
            var id = document.getElementById({{$product->id}}).value;
            var params = "idproducto="+id+"&idcarrito="+{{$carrito_id[0]->id}};

            xhr = new XMLHttpRequest();
            xhr.open('POST', '/carrito', true);
            xhr.setRequestHeader('Content-type', "application/x-www-form-urlencoded");
            xhr.setRequestHeader('X-CSRF-TOKEN', "{{ csrf_token() }}");
            xhr.onload = function(){
                if(this.responseText){
                    document.getElementById("alertamal").innerHTML = "Lo sentimos, ha habido un error en la base de datos, por favor recargue la página.";
                    y.style.display =  "block";
                    $("#alertamal").fadeIn("slow");
                    $("#alertamal").fadeOut(8000);
                } else {
                    document.getElementById("alertabien").innerHTML = "¡FELICIDADES! Ha añadido correctamente su producto al carrito de compras";
                    x.style.display =  "block";
                    $("#alertabien").fadeIn("slow");
                    $("#alertabien").fadeOut(8000);
                }
            }
            xhr.send(params);
        } 
@endforeach
</script>

@endpush

@section('content')
<div class="alert alert-success" id="alertabien">
</div>
<div class="alert alert-danger" id="alertamal">
</div>
<div class="container">
    <h1 class="text-center">NUESTROS PRODUCTOS</h1>
    <hr>
    <div class="row">
        @foreach ($productos as $producto)
            <div class="col-md-4 product-grid">
                <div class="image">
                    <a href="#">
                        <img src="storage/app/images/apple-watch.jpg" class="w-100">
                        <div class="overlay">
                            <div class="detail">View Details</div>
                        </div>
                    </a>
                </div>
                <form id="postForm{{$producto->id}}" method="POST" class="postForm">
                    @csrf
                    <input type="hidden" id="{{$producto->id}}" name="producto_id" class="producto_id" value="{{$producto->id}}">
                    <h5 class="text-center">{{$producto->nombre}}</h5>
                    <h5 class="text-center">Price: {{$producto->precio}}</h5>
                    <input id="guarda" name="guarda"type="submit" value="AÑADIR AL CARRITO" class="btn buy btn-enviar">
                </form>
            </div>
            <!-- /Product -->

        @endforeach
    </div>
</div>
@endsection

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