Hide recurring instances in admin for The Events Calendar WordPress plugin

admin.css

// Optional - a bit of spacing
.filter-checkbox {
	margin: 0 .8em;
}

admin.js

jQuery( document ).ready( function( $ ) {
  
  // Adjust query string according to checkbox and reload page
	$( '#hide_recurring_filter' ).on( 'change', function( e ) {
		var el = $( this );
		var hr = ( el.is( ':checked' ) ? '1' : '0' );
		var qs = window.location.search;
		if ( qs.indexOf( 'hide_recurring' ) === -1 ) {
			qs += '&hide_recurring=' + hr;
		} else {
			qs = qs.replace( /(hide_recurring=)[^\&]+/, '$1' + hr );
		}
		window.location.href = window.location.pathname + qs;
	});
  
});

functions.php

<?php

add_action( 'restrict_manage_posts', 'pilau_admin_filters_restrict_manage_posts' );
/**
 * Add the checkbox into the event screen filters
 */
function pilau_admin_filters_restrict_manage_posts() {
	global $post_type;

	if ( class_exists( 'TribeEvents' ) && $post_type == TribeEvents::POSTTYPE ) {
		$hide_recurring_events = isset( $_REQUEST['hide_recurring'] ) ? (bool) $_REQUEST['hide_recurring'] : true;
		?>
		<label class="filter-checkbox" for="hide_recurring_filter" title="<?php _e( 'Clicking this will reload the page' ); ?>"><input type="checkbox" name="hide_recurring" id="hide_recurring_filter" value="1" <?php checked( $hide_recurring_events ); ?>> <?php _e(  'Hide recurring instances' ); ?></label>
		<?php
	}

}

add_action( 'pre_get_posts', 'pilau_admin_filters_pre_get_posts' );
/**
 * Do the query manipulation to hide recurring instances
 */
function pilau_admin_filters_pre_get_posts( $query ) {
	if ( is_admin() ) {
		global $pagenow, $post_type;

		if ( class_exists( 'TribeEvents' ) && $post_type == TribeEvents::POSTTYPE && $pagenow == 'edit.php' ) {
			$hide_recurring_events = isset( $_REQUEST['hide_recurring'] ) ? (bool) $_REQUEST['hide_recurring'] : true;
			if ( $hide_recurring_events ) {
				$query->query_vars['post_parent'] = 0;
			}
		}

	}
}