Slider: Using Tiny Slider & Attachments Plugin

functions.php

if (class_exists( 'Attachments' ) ) {
	require_once "lib/attachments.php";
}
function alpha_assets(){
	wp_enqueue_style("tns-style", "//cdnjs.cloudflare.com/ajax/libs/tiny-slider/2.9.3/tiny-slider.css");


    wp_enqueue_script( "tns-js", "//cdnjs.cloudflare.com/ajax/libs/tiny-slider/2.9.2/min/tiny-slider.js", null, "0.0.1", true);
    wp_enqueue_script( "alpha-main", get_theme_file_uri("/assets/js/main.js"),array("jquery", "featherlight-js"), VERSION, true );  // Min wordpress version need 4.7
}

add_action("wp_enqueue_scripts", "alpha_assets");

lib/attachments.php

<?php

define( 'ATTACHMENTS_SETTINGS_SCREEN', false ); // disable the Settings screen
add_filter( 'attachments_default_instance', '__return_false' ); // disable the default instance


function alpha_attachments($attachments){
	$fields         = array(
	    array(
	      'name'      => 'title',                   
	      'type'      => 'text',          
	      'label'     => __( 'Title', 'alpha' ), 
	    ),
	);

  $args = array(

    'label'         => 'My Attachments',
    'post_type'     => array( 'post'),
    'filetype'      => array("image"), 
    'note'          => 'Attach files here!',
    'button_text'   => __( 'Attach Files', 'alpha' ),
    'fields'        => $fields,

  );

  $attachments->register('slider', $args);
}

add_action( 'attachments_register', 'alpha_attachments' );

main.js

(function($){
	$(document).ready(function(){
		var slider = tns({
		    container: '.slider',
		    speed: 300,
		    items: 1,
		    autoplay: true,
		    autoHeight: true,
		    controls: false,
		    nav: false,
		    autoplayButtonOutput: false 
	  });
	});
})(jQuery);

I am using slider for my single post:

<?php if (class_exists( 'Attachments' ) ): ?>
<div class="col-md-12">
    <div class="slider">
        <?php 
        $attachments = new Attachments('slider'); 
        if ($attachments->exist()) {
            while ($attachment = $attachments->get()) {
                ?>
                <div>
                    <?php echo $attachments->image('large'); ?>
                </div>
               <?php
            }
        }

        ?>
    </div>
</div>  
<?php endif ?>

https://github.com/jchristopher/attachments/#attachments

https://github.com/ganlanyuan/tiny-slider