Formatted Duration

react-intl is an amazing library providing React components and API to localize your application, however it lacks a Duration component.

If you want to show the time it takes to do something like 1 minute or 5 minutes or even a simple timer 0:30 you're out of luck because the ECMA committee hasn't specified the DurationFormat yet.

This component provides a very simple abstraction that works on React (DOM), React Native and any other target environment to format simple durations.

Usage

npm i --save react-intl-formatted-duration

Extended format

// Using React DOM
import React from 'react';
import FormattedDuration from 'react-intl-formatted-duration';

import styled from 'styled-components';
const Text = styled.span``;

export default MyComponent() {
  return <FormattedDuration value={60} textComponent={Text} />
  // will render `1 minute`
}

It's not necessary to use styled components, you can use any component you like available on your target environment

// Using React Native
import React from 'react';
import FormattedDuration from 'react-intl-formatted-duration';

import { Text } from 'react-native';

export default MyComponent() {
  return <FormattedDuration value={60} textComponent={Text} />
  // will render `1 minute`
}

Styling numbers

If you want to style numbers differently from text you can pass a valueComponent

<FormattedDuration value={90} textComponent={Text} valueComponent={Value} />

// renders

<Value>1</Value> <Text>minute</Text> <Value>30</Value> <Text>seconds</Text>

Having different components is useful not only for styling. Some languages use different numbering systems. For example Japanese has full-width numbers, so you might want to render １０分 instead of 10分, to do so you can use:

import React from 'react';
import { FormattedNumber } from 'react-intl';
import FormattedDuration from 'react-intl-formatted-duration';

/*
You'll also need to select Japanese locale and configure the IntlProvider to use
`ja-JP-u-nu-fullwide`

Somewhere in you application
import { IntlProvider } from 'react-intl';
<IntlProvider
   locale="ja-JP-u-nu-fullwide"
/>
 */

export default MyComponent() {
  return <FormattedDuration value={600} textComponent={Text} valueComponent={FormattedNumber} />
  // will render `１０分`
}

Timer format

import FormattedDuration, { TIMER_FORMAT } from 'react-intl-formatted-duration';

export default MyComponent() {
  return <FormattedDuration value={60} textComponent={Text} format={TIMER_FORMAT} />
  // will render `1:00`
}

Localization

react-intl-formatted-duration expects the following keys inside your translation file

• react-intl-formatted-duration.longFormatting the default format that generates something like 1 minute 30 seconds. It uses the values {minutes} and {seconds}. For example you can change it to {minutes} and {seconds}.
• react-intl-formatted-duration.duration the format used by the minutes and seconds variables described above. It uses the values {value} and {unit}. The default is {value} {unit} where value is a number and {unit} is the textual unit like minute(s) or second(s).
• react-intl-formatted-duration.timerFormatting format for TIMER_FORMAT, defaults to {minutes}:{seconds} where both values are numbers padded to have a minimum length of 2 characters
• react-intl-formatted-duration.minutesPlural string for plural minutes
• react-intl-formatted-duration.minutesSingular string for singular minutes
• react-intl-formatted-duration.secondsPlural string for plural seconds
• react-intl-formatted-duration.secondsSingular string for singular seconds

If you're using the extract-intl script from react-boilerplate you can import react-intl-formatted-duration/messages to automatically generate the keys in your translation files.