Storefront theme 404 page customizations

add_action( 'template_redirect', function() {

	// 404 Only
	if( ! is_404() ) {
		return;
	}

	// Change 404 Body
	add_filter( 'gettext', function( $text ) {

		switch( $text ) {

			// Match Theme's 404 Body Text
			case 'Nothing was found at this location. Try searching, or check out the links below.':
				echo wpautop(
					'Nothing was found at this location. Try searching, or check out the links on this page.'
				);

				// Show General Site Search Form
				get_search_form();

				// Cancel Default Behavior
				return '';
				break;

			case 'Promoted Products':
			case 'Featured Products':
			case 'On Sale Now':
			case 'New In Store':
			case 'Product Categories':
			case 'Popular Products':
				return '';
				break;

			// Other Strings
			default:
				return $text;
		}

	} );

	// Prevent Promoted Products Widgets
	global $shortcode_tags;
	unset( $shortcode_tags['featured_products'] );
	unset( $shortcode_tags['sale_products'] );
	unset( $shortcode_tags['recent_products'] );
	unset( $shortcode_tags['best_selling_products'] );

	// Hide Product Search Widget Section
	add_action( 'wp_print_footer_scripts', function() {

		?>
		<script type="text/javascript">
			document.querySelector( 'section[aria-label="Search"]' )
				.style.display = 'none';
		</script>
		<?php

	} );

} );