Shortcode?

Hello, no sorry this plugin is a block only. It could theoretically be possible but you would have to create the shortcode as this plugin does not provide one.

Ok, I undestand
And how do you think I could do that?

You would use something like serialize_blocks() passing in array, like this for example:

$shortcode_content = serialize_blocks( array(
	'cloudcatch/splide-carousel',
	array(
		'interval' => 5000,
		'breakpointTablet' => 1079,
		'breakpointMobile' => 599,
		'extensions' => array(
			'autoScroll' => false,
			'urlHash' => false
		)
	),
	array(
		array(
			'cloudcatch/splide-carousel-item',
			array(),
			array(
				array(
					'core/quote',
					array(),
					array(
						array(
							'core/paragraph',
							array(),
							array()
						),
						
					)
				),
				
			)
		),
		array(
			'cloudcatch/splide-carousel-item',
			array(),
			array(
				array(
					'core/quote',
					array(),
					array(
						array(
							'core/paragraph',
							array(),
							array()
						),
						
					)
				),
				
			)
		),
		array(
			'cloudcatch/splide-carousel-item',
			array(),
			array(
				array(
					'core/quote',
					array(),
					array(
						array(
							'core/paragraph',
							array(),
							array()
						),
						
					)
				),
				
			)
		),
		
	)
) );

Stick that in a shortcode using the add_shortcode() function.

This is untested.

It would be easier to create a new shortcode, enqueing Splide via CDN or other means, and returning shortcode content that follows the proper structure splide requires.

Something like this:

function enqueue_splide_assets() {
    // Enqueue Splide CSS and JS from CDN
    wp_enqueue_style( 'splide-core-css', 'https://cdn.jsdelivr.net/npm/@splidejs/[email protected]/dist/css/splide.min.css', array(), '4.0.7' );
    wp_enqueue_script( 'splide-js', 'https://cdn.jsdelivr.net/npm/@splidejs/[email protected]/dist/js/splide.min.js', array(), '4.0.7', true );
}
add_action( 'wp_enqueue_scripts', 'enqueue_splide_assets' );

function splide_carousel_shortcode() {
    ob_start();
    ?>
    <div id="splide-carousel" class="splide">
        <div class="splide__track">
            <ul class="splide__list">
                <li class="splide__slide">Slide 1</li>
                <li class="splide__slide">Slide 2</li>
                <li class="splide__slide">Slide 3</li>
            </ul>
        </div>
    </div>

    <script>
        document.addEventListener( 'DOMContentLoaded', function () {
            new Splide( '#splide-carousel', {
                type   : 'loop',
                perPage: 3,
                autoplay: true,
            } ).mount();
        } );
    </script>
    <?php
    return ob_get_clean();
}
add_shortcode( 'splide_carousel', 'splide_carousel_shortcode' );

Thanks!