themes-wordpress/blank-canvas-blocks/functions.php

<?php
if ( ! function_exists( 'blank_canvas_blocks_support' ) ) :
	function blank_canvas_blocks_support() {

		// Alignwide and alignfull classes in the block editor.
		add_theme_support( 'align-wide' );

		// Add support for experimental link color control.
		add_theme_support( 'experimental-link-color' );

		// Add support for responsive embedded content.
		// https://github.com/WordPress/gutenberg/issues/26901
		add_theme_support( 'responsive-embeds' );

		// Add support for editor styles.
		add_theme_support( 'editor-styles' );

		// Enqueue editor styles.
		add_editor_style(
			array(
				'/assets/ponyfill.css',
			)
		);
	}
	add_action( 'after_setup_theme', 'blank_canvas_blocks_support' );
endif;

/**
 *
 * Enqueue scripts and styles.
 */
function blank_canvas_editor_styles() {
	// Enqueue editor styles.
	add_editor_style(
		array(
			blank_canvas_blocks_fonts_url(),
		)
	);
}
add_action( 'admin_init', 'blank_canvas_editor_styles' );

/**
 *
 * Enqueue scripts and styles.
 */
function blank_canvas_blocks_scripts() {
	// Enqueue Google fonts
	wp_enqueue_style( 'blank-canvas-blocks-fonts', blank_canvas_blocks_fonts_url(), array(), null );
	wp_enqueue_script( 'blank-canvas-navigation-script', get_template_directory_uri() . '/assets/navigation.js', array(), wp_get_theme()->get( 'Version' ), true );
	wp_enqueue_style( 'blank_canvas_blocks-ponyfill', get_template_directory_uri() . '/assets/ponyfill.css', array(), wp_get_theme()->get( 'Version' ) );
}
add_action( 'wp_enqueue_scripts', 'blank_canvas_blocks_scripts' );

/**
 * Add Google webfonts
 *
 * @return $fonts_url
 */

function blank_canvas_blocks_fonts_url() {
	$fonts_url = '';
	if ( ! class_exists( 'WP_Theme_JSON_Resolver' ) ) {
		return '';
	}

	$theme_data = WP_Theme_JSON_Resolver::get_merged_data()->get_settings();
	if ( empty( $theme_data ) || empty( $theme_data['defaults'] ) || empty( $theme_data['defaults']['custom'] ) ) {
		return '';
	}

	$custom_data = $theme_data['defaults']['custom'];
	if ( array_key_exists( 'fontsToLoadFromGoogle', $custom_data ) ) {
		$font_families = $theme_data['defaults']['custom']['fontsToLoadFromGoogle'];

		$font_families[] = 'display=swap';

		// Make a single request for the theme fonts.
		$fonts_url = 'https://fonts.googleapis.com/css2?' . implode( '&', $font_families );
	}

	return esc_url_raw( $fonts_url );
}

/**
 * Block Patterns.
 */
require get_template_directory() . '/inc/block-patterns.php';