WordPress Plugin: Infinite scroll support for WP List Tables in the WordPress admin panel.

infinite-wp-list-tables.php

<?php
/**
 * Plugin Name: Infinite WP List Tables
 * Description: Infinite scroll support for WP List Tables in the WordPress admin panel.
 * Version: 0.1.0
 * Author: Brady Vercher
 * Author URI: http://www.blazersix.com/
 * License: GPL-2.0+
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 */

/**
 * Enqueue and print scripts and styles in the admin footer.
 */
function iwplt_admin_footer() {
	// Enqueue the Infinite Scroll script.
	wp_enqueue_script(
		'jquery-infinite-scroll',
		'//cdn.jsdelivr.net/jquery.infinitescroll/2.0b2/jquery.infinitescroll.js',
		array( 'jquery' ),
		'2.0b2',
		true
	);

	wp_localize_script( 'jquery-infinite-scroll', 'iwpltL10n', array(
		'loadingMessage' => __( 'Loading&hellip;', 'iwplt' ),
	) );
	?>

	<script type="text/javascript">
	jQuery(function( $ ) {
		var $msgEl = $( '<tr id="iwplt-loading"><td class="colspanchange"></td></tr>' );

		// Ensure the loading message cell spans the appropriate number of columns.
		$msgEl.find( '.colspanchange' )
			.attr( 'colspan', $( '.wp-list-table thead tr' ).children( ':visible' ).length )
			.append( '<span class="spinner"></span> ' )
			.append( iwpltL10n.loadingMessage );

		$( '#the-list' ).infinitescroll({
			loading: {
				finished: function() {
					$( '#iwplt-loading' ).hide();
				},
				msg: $msgEl
			},
			navSelector: '.pagination-links',
			nextSelector: '.next-page',
			itemSelector: '#the-list tr',
			contentSelector: '#the-list',
			maxPage: $( '.total-pages' ).first().text()
		});
	});
	</script>

	<style type="text/css">
	tr#iwplt-loading td {
		padding: 10px;
		vertical-align: middle;
	}

	tr#iwplt-loading .spinner {
		display: inline-block;
		float: none;
		margin-top: 0;
		vertical-align: middle;
	}
	</style>
	<?php
}
add_action( 'admin_footer', 'iwplt_admin_footer' );

Hi! I'm having a difficulty in scrolling in the main Wordpress admin panel (when editing the pages - I have several pages, but just can access to the first one in the list). If this is the fix, where am I supposed to paste this file? wp-includes folder? wp-content folder? or where? Thanks in advance, from Buenos Aires :)