Ready to take i18next to the next level?

Formatting

Formatting
You can define a function to handle formattings. Beside formatting numbers or dates you can use this to define custom formattings.
You can add formatting using moment.js and numeral.js or the intl api.
Basic
As a sample using momentjs to format dates.
keys
{
    "key": "The current date is {{date, MM/DD/YYYY}}",
    "key2": "{{text, uppercase}} just uppercased"
}
Init i18next with a format function:
i18next.init({
    interpolation: {
        format: function(value, format, lng) {
            if (format === 'uppercase') return value.toUpperCase();
            if(value instanceof Date) return moment(value).format(format);
            return value;
        }
    }
});
sample
i18next.t('key', { date: new Date() });
// -> "The current date is 07/13/2016"
​
i18next.t('key2', { text: 'can you hear me' });
// => "CAN YOU HEAR ME just uppercased"
Keep the language on moment in sync with i18next by listening to the change language event:
i18next.on('languageChanged', function(lng) {
  moment.locale(lng);
});
Additional options
Prefix/Suffix for interpolation and other options can be overridden in init option:
sample
i18next.init({
    interpolation: { ... }
});
option
default
description
alwaysFormat
false
used to always call the format function for all interpolated values
format
noop function
format function function format(value, format, lng) {}
formatSeparator
','
used to separate format from interpolation value
While there are a lot of options going with the defaults should get you covered.

Translation Function - Previous

Interpolation

Next - Translation Function

Plurals

Last updated 3 months ago

option	default	description
alwaysFormat	false	used to always call the format function for all interpolated values
format	noop function	format function `function format(value, format, lng) {}`
formatSeparator	','	used to separate format from interpolation value