Source

File: wp-includes/general-template.php

function wp_enqueue_code_editor( $args ) {
	if ( is_user_logged_in() && 'false' === wp_get_current_user()->syntax_highlighting ) {
		return false;
	}

	$settings = wp_get_code_editor_settings( $args );

	if ( empty( $settings ) || empty( $settings['codemirror'] ) ) {
		return false;
	}

	wp_enqueue_script( 'code-editor' );
	wp_enqueue_style( 'code-editor' );

	if ( isset( $settings['codemirror']['mode'] ) ) {
		$mode = $settings['codemirror']['mode'];
		if ( is_string( $mode ) ) {
			$mode = array(
				'name' => $mode,
			);
		}

		if ( ! empty( $settings['codemirror']['lint'] ) ) {
			switch ( $mode['name'] ) {
				case 'css':
				case 'text/css':
				case 'text/x-scss':
				case 'text/x-less':
					wp_enqueue_script( 'csslint' );
					break;
				case 'htmlmixed':
				case 'text/html':
				case 'php':
				case 'application/x-httpd-php':
				case 'text/x-php':
					wp_enqueue_script( 'htmlhint' );
					wp_enqueue_script( 'csslint' );
					wp_enqueue_script( 'jshint' );
					if ( ! current_user_can( 'unfiltered_html' ) ) {
						wp_enqueue_script( 'htmlhint-kses' );
					}
					break;
				case 'javascript':
				case 'application/ecmascript':
				case 'application/json':
				case 'application/javascript':
				case 'application/ld+json':
				case 'text/typescript':
				case 'application/typescript':
					wp_enqueue_script( 'jshint' );
					wp_enqueue_script( 'jsonlint' );
					break;
			}
		}
	}

	wp_add_inline_script( 'code-editor', sprintf( 'jQuery.extend( wp.codeEditor.defaultSettings, %s );', wp_json_encode( $settings ) ) );

	/**
	 * Fires when scripts and styles are enqueued for the code editor.
	 *
	 * @since 4.9.0
	 *
	 * @param array $settings Settings for the enqueued code editor.
	 */
	do_action( 'wp_enqueue_code_editor', $settings );

	return $settings;
}