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function is not described

rich_edit_exists() WP 2.1.0

Deprecated in 3.9.0. It is no longer supported and can be removed in future releases. It is recommended to replace this function with the same one.

Determine if TinyMCE is available.

Checks to see if the user has deleted the tinymce files to slim down their WordPress installation.

No Hooks.

Return

true/false. Whether TinyMCE exists.

Usage

rich_edit_exists();

Code of rich edit exists: wp-includes/deprecated.php WP 5.2.2

<?php
function rich_edit_exists() {
	global $wp_rich_edit_exists;
	_deprecated_function( __FUNCTION__, '3.9.0' );

	if ( ! isset( $wp_rich_edit_exists ) )
		$wp_rich_edit_exists = file_exists( ABSPATH . WPINC . '/js/tinymce/tinymce.js' );

	return $wp_rich_edit_exists;
}