what is the difference between Drupal.formatPlural() and Drupal.t()?

Question

what is the difference between :

Drupal.t(string, arguments, options ) and Drupal.formatPlural()

Drupal.t() is used in the javascript part to translate the string and it can accept a set of arguments that will translate the string placeholders ex:

var translatedString = Drupal.t('a string about @subject that needs to be translated', {'@subject': 'Javascript in Drupal'});

what about Drupal.formatPlural()

Answer 1

Actually after some playing aroud with the code I HAVE FOUND THE ANSWER :

formatPlural($count, $singular, $plural, array $args = array(), array $options = array());

code

the formPlural function enable us to translate a string in plural or singular format according to the first argument $count , a $singualr string will display if $count = 0 or 1 otherwise if $count > 1 the $plural string will be displayed , and in plural string we can get the $count value using @count , for example in the code bellow :

• the first formPlural function will return $singular string since $count = 1
• the second formPlural function will return $plural string since $count > 1

var typeVar = 'list';
var singular = Drupal.formatPlural(1, 'I have 1 item', 'I have many @type items', {'@type': typeVar});
$('#translate_singular_item').html(  singular   );


var plural = Drupal.formatPlural(3, 'I have 1 item', 'I have @count @type items', {'@type': typeVar});
$('#translate_plural_item').html(  plural  );

output

Back-office Translation

now we can translate both singular and plural string :