using javascript to pass my current post to ajax

I have alpine.js making a api call from Ajax.

In my Ajax I need to have the post type update depending on the current post type, I can set this is a php file.

I would like to get the current post type with wp php

    $post_type = get_post_type( $post->ID );
    $postType = get_queried_object();
 $args = array(
                    'post_type'      => $post_type,
                    'post_status'    => 'publish',
                );

then pass into my javascript and have that post type known with the ajax so no matter what post type i have the ajax and js know.

**js
**

 import Alpine from 'alpinejs'


Alpine.data("filterPosts", (adminURL) => ({
    posts: "",
    limit: 10,
    category: null,
    showDefault: true,
    showFiltered: false,

    filterPosts(id) {
        this.showDefault = false;
        this.showFiltered = true;
        this.category = id;
        this.fetchPosts();
    },

    fetchPosts() {
        var formData = new FormData();
        formData.append("action", "filterPosts");
        formData.append("offset", this.offset);
        formData.append("limit", this.limit);

        if (this.category) {
            formData.append("category", this.category);
        }

        fetch(adminURL, {
            method: "POST",
            body: formData,
        })
        .then((res) => res.json())
        .then((res) => {
            this.posts = res.posts;
        });
    }
}));
 
window.Alpine = Alpine
Alpine.start()

Ajax

?php
// the ajax function
add_action('wp_ajax_filterPosts', 'filterPosts');
add_action('wp_ajax_nopriv_filterPosts', 'filterPosts');

function filterPosts()
{
    $response = [
        'posts' => "",
    ];

    $filter_args = array(
        'post_status' => 'publish',
        'post_type' => 'post'
    );

    if ($_POST['limit']) {
        $filter_args['posts_per_page'] = $_POST['limit'];
    }

    if ($_POST['category']) {
        $filter_args['cat'] = $_POST['category'];
    }

    $filter_query = new WP_Query($filter_args);

    if ($filter_query->have_posts()) :
        while ($filter_query->have_posts()) : $filter_query->the_post();
            $response['posts'] .= load_template_part('/template-parts/posts-filter/single-post');
        endwhile;
        wp_reset_postdata();
    endif;

    echo json_encode($response);
    die();