psammead-timestamp-container - 
Description
psammead-timestamp-container is a React container that offers relative and absolute times, with timezone support - using moment-timezone. Relative times are currently hard-coded to English (e.g. 3 minutes ago). psammead-timestamp-container returns a single time element.
Exports
/utilities - exports functions for dealing with timestamps.
When to use this component
psammead-timestamp-container is intended to be used when a single time DOM element that has the possibility of having varying time formats and timezones is required.
Installation
npm install @bbc/psammead-timestamp-container
Props
| Argument | Type | Required | Default | Example |
|---|---|---|---|---|
| timestamp | number or string | Yes | N/A | 1530947227000, '2012-03-08T12:17:24.000Z' |
| dateTimeFormat | string | Yes | N/A | YYYY-MM-DD |
| isRelative | boolean | No | false | true |
| format | string | No | null | D MMMM YYYY, HH:mm z |
| timezone | string | No | 'Europe/London' | 'Europe/London' |
| padding | boolean | No | true | false |
| prefix | string | No | null | Updated |
| suffix | string | No | null | This is a suffix |
| script | object | Yes | N/A | { canon: { groupA: { fontSize: '28', lineHeight: '32',}, groupB: { fontSize: '32', lineHeight: '36', }, groupD: { fontSize: '44', lineHeight: '48', }, }, trafalgar: { groupA: { fontSize: '20', lineHeight: '24', }, groupB: { fontSize: '24', lineHeight: '28', }, groupD: { fontSize: '32', lineHeight: '36', }, }, } |
| locale | string | no | null | en |
| service | string | yes | null | news |
| altCalendar | object | no | null | See the jalaali calendar in psammead-calendars as an example |
locale should be a momentjs locale.
Usage
import { latin } from '@bbc/gel-foundations/scripts';
const WrappingContainer = () => (
<Timestamp
timestamp={1530947227000}
dateTimeFormat="YYYY-MM-DD"
isRelative={false}
format="D MMMM YYYY"
timezone="Europe/London"
prefix="Updated"
suffix="."
script={latin}
locale="en"
/>
);
Utilities
formatDuration
import { formatDuration } from '@bbc/psammead-timestamp-container/utilities';
const localisedDuration = formatDuration({ duration: 'PTM30', locale: 'my' });
const customFormatDuration = formatDuration({
duration: 'PTM30',
format: 'mm,ss',
});
| Argument | Type | Required | Default | Example |
|---|---|---|---|---|
| duration | string | Yes | N/A | PTH1M29S30 Duration string as specified by ISO 8601 standard. |
| format | string | No | mm:ss, or h:mm:ss if in hours | mm,ss |
| locale | string | No | en-gb | fr |
localisedMoment
import { localisedMoment } from '@bbc/psammead-timestamp-container/utilities';
const localisedMoment = localisedMoment({ locale, timestamp });
| Argument | Type | Required | Default | Example |
|---|---|---|---|---|
| timestamp | number or string | Yes | N/A | 1539969006000 (Unix timestamp), '2012-03-08T12:17:24.000Z' (ISO8601 string) |
| locale | string | Yes | N/A | fr |
formatUnixTimestamp
import { localiseTimestamp } from '@bbc/psammead-timestamp-container/utilities';
const formattedTime = formatUnixTimestamp({
format,
isRelative,
locale,
timestamp,
timezone,
});
| Argument | Type | Required | Default | Example |
|---|---|---|---|---|
| format | string | No | 'LL, LT z' | 'D MMMM YYYY z' a moment format string |
| isRelative | boolean | Yes | N/A | true When true, formats in relative time |
| locale | string | Yes | N/A | fr Moment locale |
| timestamp | number or string | Yes | N/A | 1539969006000 (Unix timestamp), '2012-03-08T12:17:24.000Z' (ISO8601 string) |
| timezone | string | Yes | N/A | 'GMT', 'Asia/Seoul' see (moment-timezone documentation)[https://momentjs.com/timezone/] |
Accessibility notes
The usage of the semantic time element within psammead-timestamp component can result in strange behaviours when using assistive technology such as VoiceOver for iOS. Specifically, it results in a "text splitting" behaviour, where any text in the prefix is read out, but the value inside the semantic time element require an additional swipe before being read out.
However, as we heavily encourage the use of this semantic element, and want to ensure it's usage is in line with the W3C examples, we feel this compromise is necessary.
Roadmap
Currently, this package only supports relative time in English. The plan is to make this package more suitable for use on World Service sites by including logic to render relative time in multiple languages.
Contributing
Psammead is completely open source. We are grateful for any contributions, whether they be new components, bug fixes or general improvements. Please see our primary contributing guide which can be found at the root of the Psammead respository.
Code of Conduct
We welcome feedback and help on this work. By participating in this project, you agree to abide by the code of conduct. Please take a moment to read it.
License
Psammead is Apache 2.0 licensed.