harmony 鸿蒙@ohos.intl (Internationalization)

2022-08-09
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@ohos.intl (Internationalization)

The intl module provides basic i18n capabilities, such as time and date formatting, number formatting, and string sorting, through the standard i18n APIs defined in ECMA 402. The i18n module provides enhanced i18n capabilities through supplementary interfaces that are not defined in ECMA 402. It works with the intl module to provide a complete suite of i18n capabilities.

NOTE - The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.

This module provides basic i18n capabilities, such as time and date formatting, number formatting, and string sorting, through the standard i18n interfaces defined in ECMA 402. For details about the enhanced i18n capabilities, see i18n.

Modules to Import

import Intl from '@ohos.intl';

Locale

Attributes

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
language	string	Yes	No	Language associated with the locale, for example, zh.
script	string	Yes	No	Script type of the language, for example, Hans.
region	string	Yes	No	Region associated with the locale, for example, CN.
baseName	string	Yes	No	Basic key information about the locale, which consists of the language, script, and region, for example, zh-Hans-CN.
caseFirst	string	Yes	No	Whether case is taken into account for the locale’s collation rules. The value can be upper, lower, or false.
calendar	string	Yes	No	Calendar for the locale. The value can be any of the following: buddhist, chinese, coptic, dangi, ethioaa, ethiopic, gregory, hebrew, indian, islamic, islamic-umalqura, islamic-tbla, islamic-civil, islamic-rgsa, iso8601, japanese, persian, roc, or islamicc.
collation	string	Yes	No	Rule for sorting regions. The value can be any of the following: big5han, compat, dict, direct, ducet, eor, gb2312, phonebk, phonetic, pinyin, reformed, searchjl, stroke, trad, unihan, zhuyin.
hourCycle	string	Yes	No	Time system for the locale. The value can be any of the following: h12, h23, h11, or h24.
numberingSystem	string	Yes	No	Numbering system for the locale. The value can be any of the following: adlm, ahom, arab, arabext, bali, beng, bhks, brah, cakm, cham, deva, diak, fullwide, gong, gonm, gujr, guru, hanidec, hmng, hmnp, java, kali, khmr, knda, lana, lanatham, laoo, latn, lepc, limb, mathbold, mathdbl, mathmono, mathsanb, mathsans, mlym, modi, mong, mroo, mtei, mymr, mymrshan, mymrtlng, newa, nkoo, olck, orya, osma, rohg, saur, segment, shrd, sind, sinh, sora, sund, takr, talu, tamldec, telu, thai, tibt, tirh, vaii, wara, wcho.
numeric	boolean	Yes	No	Whether to apply special collation rules for numeric characters. The default value is false.

constructor⁸⁺

constructor()

Creates a Locale object.

System capability: SystemCapability.Global.I18n

Example

  // The default constructor uses the current system locale to create a Locale object.
  let locale = new Intl.Locale();
  // Return the current system locale.
  let localeID = locale.toString();

constructor

constructor(locale: string, options?: LocaleOptions)

Creates a Locale object.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
locale	string	Yes	A string containing locale information, including the language, optional script, and region. For details about the international standards and combination modes for the language, script, and country or region, see intl Development.
options	LocaleOptions	No	Options for creating the Locale object.

Example

  // Create a Locale object named zh-CN.
  let locale = new Intl.Locale("zh-CN");
  let localeID = locale.toString(); // localeID = "zh-CN"

toString

toString(): string

Obtains the string representation of a Locale object.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
string	String representation of the Locale object.

Example

  // Create a Locale object named en-GB.
  let locale = new Intl.Locale("en-GB");
  let localeID = locale.toString(); // localeID = "en-GB"

maximize

maximize(): Locale

Maximizes information of the Locale object. If the script and locale information is missing, add the information.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
Locale	Locale object with the maximized information.

Example

  // Create a Locale object named zh.
  let locale = new Intl.Locale("zh");
  // Complete the script and region of the Locale object.
  let maximizedLocale = locale.maximize();
  let localeID = maximizedLocale.toString(); // localeID = "zh-Hans-CN"

  // Create a Locale object named en-US.
  locale = new Intl.Locale("en-US");
  // Complete the script of the Locale object.
  maximizedLocale = locale.maximize();
  localeID = maximizedLocale.toString(); // localeID = "en-Latn-US"

minimize

minimize(): Locale

Minimizes information of the Locale object. If the script and locale information is present, delete the information.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
Locale	Locale object with the minimized information.

Example

  // Create a Locale object named zh-Hans-CN.
  let locale = new Intl.Locale("zh-Hans-CN");
  // Remove the script and region of the Locale object.
  let minimizedLocale = locale.minimize();
  let localeID = minimizedLocale.toString(); // localeID = "zh"

  // Create a Locale object named en-US.
  locale = new Intl.Locale("en-US");
  // Remove the region of the Locale object.
  minimizedLocale = locale.minimize();
  localeID = minimizedLocale.toString(); // localeID = "en"

LocaleOptions⁶⁺

Represents the locale options. Since API version 9, the attributes in LocaleOptions are optional.

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
calendar	string	Yes	Yes	Calendar for the locale. The value can be any of the following: buddhist, chinese, coptic, dangi, ethioaa, ethiopic, gregory, hebrew, indian, islamic, islamic-umalqura, islamic-tbla, islamic-civil, islamic-rgsa, iso8601, japanese, persian, roc, or islamicc.
collation	string	Yes	Yes	Collation rule. The value can be any of the following: big5han, compat, dict, direct, ducet, emoji, eor, gb2312, phonebk, phonetic, pinyin, reformed, search, searchjl, standard, stroke, trad, unihan, zhuyin.
hourCycle	string	Yes	Yes	Time system for the locale. The value can be any of the following: h11, h12, h23, or h24.
numberingSystem	string	Yes	Yes	Numbering system for the locale. The value can be any of the following: adlm, ahom, arab, arabext, bali, beng, bhks, brah, cakm, cham, deva, diak, fullwide, gong, gonm, gujr, guru, hanidec, hmng, hmnp, java, kali, khmr, knda, lana, lanatham, laoo, latn, lepc, limb, mathbold, mathdbl, mathmono, mathsanb, mathsans, mlym, modi, mong, mroo, mtei, mymr, mymrshan, mymrtlng, newa, nkoo, olck, orya, osma, rohg, saur, segment, shrd, sind, sinh, sora, sund, takr, talu, tamldec, telu, thai, tibt, tirh, vaii, wara, wcho.
numeric	boolean	Yes	Yes	Whether to use the 12-hour clock. The default value is false.
caseFirst	string	Yes	Yes	Whether upper case or lower case is sorted first. The value can be upper, lower, or false.

DateTimeFormat

constructor⁸⁺

constructor()

Creates a DateTimeOptions object for the specified locale.

System capability: SystemCapability.Global.I18n

Example

  // Use the current system locale to create a DateTimeFormat object.
  let datefmt= new Intl.DateTimeFormat();

constructor

constructor(locale: string|Array<string>, options?: DateTimeOptions)

Creates a DateTimeOptions object for the specified locale.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
locale	string \|Array<string>	Yes	A string containing locale information, including the language, optional script, and region.
options	DateTimeOptions	No	Options for creating a DateTimeFormat object. If no options are set, the default values of year, month, and day are numeric.

Example

  // Use locale zh-CN to create a DateTimeFormat object. Set dateStyle to full and timeStyle to medium.
  let datefmt= new Intl.DateTimeFormat("zh-CN", { dateStyle: 'full', timeStyle: 'medium' });

Example

  // Use the locale list ["ban", "zh"] to create a DateTimeFormat object. Because ban is an invalid locale ID, locale zh is used to create the DateTimeFormat object.
  let datefmt= new Intl.DateTimeFormat(["ban", "zh"], { dateStyle: 'full', timeStyle: 'medium' });

format

format(date: Date): string

Formats the specified date and time.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
date	Date	Yes	Date and time to be formatted.

Return value

Type	Description
string	A string containing the formatted date and time.

Example

  let date = new Date(2021, 11, 17, 3, 24, 0);
  // Use locale en-GB to create a DateTimeFormat object.
  let datefmt = new Intl.DateTimeFormat("en-GB");
  let formattedDate = datefmt.format(date); // formattedDate "17/12/2021"

  // Use locale en-GB to create a DateTimeFormat object. Set dateStyle to full and timeStyle to medium.
  datefmt = new Intl.DateTimeFormat("en-GB", { dateStyle: 'full', timeStyle: 'medium' });
  formattedDate = datefmt.format(date); // formattedDate "Friday, 17 December 2021 at 03:24:00"

formatRange

formatRange(startDate: Date, endDate: Date): string

Formats the specified date range.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
startDate	Date	Yes	Start date and time to be formatted.
endDate	Date	Yes	End date and time to be formatted.

Return value

Type	Description
string	A string containing the formatted date and time range.

Example

  let startDate = new Date(2021, 11, 17, 3, 24, 0);
  let endDate = new Date(2021, 11, 18, 3, 24, 0);
  // Use locale en-GB to create a DateTimeFormat object.
  let datefmt = new Intl.DateTimeFormat("en-GB");
  let formattedDateRange = datefmt.formatRange(startDate, endDate); // formattedDateRange = "17/12/2021-18/12/2021"

resolvedOptions

resolvedOptions(): DateTimeOptions

Obtains the formatting options for DateTimeFormat object.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
DateTimeOptions	Formatting options for DateTimeFormat objects.

Example

  let datefmt = new Intl.DateTimeFormat("en-GB", { dateStyle: 'full', timeStyle: 'medium' });
  // Obtain the options of the DateTimeFormat object.
  let options = datefmt.resolvedOptions();
  let dateStyle = options.dateStyle; // dateStyle = "full"
  let timeStyle = options.timeStyle; // timeStyle = "medium"

DateTimeOptions⁶⁺

Provides the options for the DateTimeFormat object. Since API version 9, the attributes in DateTimeOptions are optional.

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
locale	string	Yes	No	Locale, for example, zh-Hans-CN.
dateStyle	string	Yes	Yes	Date display format. The value can be long, short, medium, or full.
timeStyle	string	Yes	Yes	Time display format. The value can be long, short, medium, or full.
hourCycle	string	Yes	Yes	Time system for the locale. The value can be any of the following: h11, h12, h23, or h24.
timeZone	string	Yes	Yes	Time zone represented by a valid IANA time zone ID.
numberingSystem	string	Yes	Yes	Numbering system for the locale. The value can be any of the following: adlm, ahom, arab, arabext, bali, beng, bhks, brah, cakm, cham, deva, diak, fullwide, gong, gonm, gujr, guru, hanidec, hmng, hmnp, java, kali, khmr, knda, lana, lanatham, laoo, latn, lepc, limb, mathbold, mathdbl, mathmono, mathsanb, mathsans, mlym, modi, mong, mroo, mtei, mymr, mymrshan, mymrtlng, newa, nkoo, olck, orya, osma, rohg, saur, segment, shrd, sind, sinh, sora, sund, takr, talu, tamldec, telu, thai, tibt, tirh, vaii, wara, wcho.
hour12	boolean	Yes	Yes	Whether to use the 12-hour clock. If hour12 and hourCycle are not set and the 24-hour clock is turned on, the default value of hour12 is false.
weekday	string	Yes	Yes	Workday display format. The value can be long, short, or narrow.
era	string	Yes	Yes	Era display format. The value can be long, short, or narrow.
year	string	Yes	Yes	Year display format. The value can be numeric or 2-digit.
month	string	Yes	Yes	Month display format. The value can be any of the following: numeric, 2-digit, long, short, narrow.
day	string	Yes	Yes	Day display format. The value can be numeric or 2-digit.
hour	string	Yes	Yes	Hour display format. The value can be numeric or 2-digit.
minute	string	Yes	Yes	Minute display format. The value can be numeric or 2-digit.
second	string	Yes	Yes	Seconds display format. The value can be numeric or 2-digit.
timeZoneName	string	Yes	Yes	Localized representation of a time zone name.
dayPeriod	string	Yes	Yes	Time period display format. The value can be long, short, or narrow.
localeMatcher	string	Yes	Yes	Locale matching algorithm. The value can be lookup or best fit.
formatMatcher	string	Yes	Yes	Format matching algorithm. The value can be basic or best fit.

NumberFormat

constructor⁸⁺

constructor()

Creates a NumberFormat object for the specified locale.

System capability: SystemCapability.Global.I18n

Example

  // Use the current system locale to create a NumberFormat object.
  let numfmt = new Intl.NumberFormat();

constructor

constructor(locale: string|Array<string>, options?: NumberOptions)

Creates a NumberFormat object for the specified locale.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
locale	string \|Array<string>	Yes	A string containing locale information, including the language, optional script, and region.
options	NumberOptions	No	Options for creating a NumberFormat object.

Example

  // Use locale en-GB to create a NumberFormat object. Set style to decimal and notation to scientific.
  let numfmt = new Intl.NumberFormat("en-GB", {style:'decimal', notation:"scientific"});

format

format(number: number): string;

Formats a number.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
number	number	Yes	Number to be formatted.

Return value

Type	Description
string	Formatted number.

Example

  // Use locale list ["en-GB", "zh"] to create a NumberFormat object. Because en-GB is a valid locale ID, it is used to create the NumberFormat object.
  let numfmt = new Intl.NumberFormat(["en-GB", "zh"], {style:'decimal', notation:"scientific"});
  let formattedNumber = numfmt.format(1223); // formattedNumber = 1.223E3

resolvedOptions

resolvedOptions(): NumberOptions

Obtains the options of the NumberFormat object.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
NumberOptions	Formatting options for NumberFormat objects.

Example

  let numfmt = new Intl.NumberFormat(["en-GB", "zh"], {style:'decimal', notation:"scientific"});
  // Obtain the options of the NumberFormat object.
  let options = numfmt.resolvedOptions();
  let style = options.style; // style = decimal
  let notation = options.notation; // notation = scientific

NumberOptions⁶⁺

Defines the device capability. Since API version 9, the attributes in NumberOptions are optional.

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
locale	string	Yes	No	Locale, for example, zh-Hans-CN. The default value is the system locale.
currency	string	Yes	Yes	Currency unit, for example, EUR, CNY, or USD.
currencySign	string	Yes	Yes	Currency unit symbol. The options are “standard” and “accounting”. The default value is standard.
currencyDisplay	string	Yes	Yes	Currency display mode. The value can be symbol, narrowSymbol, code, or name. The default value is symbol.
unit	string	Yes	Yes	Unit name, for example, meter, inch, or hectare.
unitDisplay	string	Yes	Yes	Unit display format. The value can be long, short, or narrow. The default value is short.
unitUsage⁸⁺	string	Yes	Yes	Unit usage scenario. The value can be any of the following: default, area-land-agricult, area-land-commercl, area-land-residntl, length-person, length-person-small, length-rainfall, length-road, length-road-small, length-snowfall, length-vehicle, length-visiblty, length-visiblty-small, length-person-informal, length-person-small-informal, length-road-informal, speed-road-travel, speed-wind, temperature-person, temperature-weather, volume-vehicle-fuel. The default value is default.
signDisplay	string	Yes	Yes	Number sign display format. The value can be auto, never, always, or expectZero. The default value is auto.
compactDisplay	string	Yes	Yes	Compact display format. The value can be long or short. The default value is short.
notation	string	Yes	Yes	Number formatting specification. The value can be standard, scientific, engineering, or compact. The default value is standard.
localeMatcher	string	Yes	Yes	Locale matching algorithm. The value can be lookup or best fit. The default value is best fit.
style	string	Yes	Yes	Number display format. The value can be decimal, currency, percent, or unit. The default value is decimal.
numberingSystem	string	Yes	Yes	Numbering system for the locale. The value can be any of the following: adlm, ahom, arab, arabext, bali, beng, bhks, brah, cakm, cham, deva, diak, fullwide, gong, gonm, gujr, guru, hanidec, hmng, hmnp, java, kali, khmr, knda, lana, lanatham, laoo, latn, lepc, limb, mathbold, mathdbl, mathmono, mathsanb, mathsans, mlym, modi, mong, mroo, mtei, mymr, mymrshan, mymrtlng, newa, nkoo, olck, orya, osma, rohg, saur, segment, shrd, sind, sinh, sora, sund, takr, talu, tamldec, telu, thai, tibt, tirh, vaii, wara, wcho. The default value is the default numbering system of the specified locale.
useGrouping	boolean	Yes	Yes	Whether to use grouping for display. The default value is auto.
minimumIntegerDigits	number	Yes	Yes	Minimum number of digits allowed in the integer part of a number. The value ranges from 1 to 21. The default value of is 1.
minimumFractionDigits	number	Yes	Yes	Minimum number of digits in the fraction part of a number. The value ranges from 0 to 20. The default value is 0.
maximumFractionDigits	number	Yes	Yes	Maximum number of digits in the fraction part of a number. The value ranges from 1 to 21. The default value is 3.
minimumSignificantDigits	number	Yes	Yes	Minimum number of the least significant digits. The value ranges from 1 to 21. The default value of is 1.
maximumSignificantDigits	number	Yes	Yes	Maximum number of the least significant digits. The value ranges from 1 to 21. The default value is 21.

Collator⁸⁺

constructor⁸⁺

constructor()

Creates a Collator object.

System capability: SystemCapability.Global.I18n

Example

  // Use the system locale to create a Collator object.
  let collator = new Intl.Collator();

constructor⁸⁺

constructor(locale: string|Array<string>, options?: CollatorOptions)

Creates a Collator object.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
locale	string \|Array<string>	Yes	A string containing locale information, including the language, optional script, and region.
options	CollatorOptions	No	Options for creating a Collator object.

Example

  // Use locale zh-CN to create a Collator object. Set localeMatcher to lookup and usage to sort.
  let collator = new Intl.Collator("zh-CN", {localeMatcher: "lookup", usage: "sort"});

compare⁸⁺

compare(first: string, second: string): number

Compares two strings based on the sorting policy of the Collator object.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
first	string	Yes	First string to compare.
second	string	Yes	Second string to compare.

Return value

Type	Description
number	Comparison result. If the value is a negative number, the first string is before the second string. If the value of number is 0, the first string is equal to the second string. If the value of number is a positive number, the first string is after the second string.

Example

  // Use locale en-GB to create a Collator object.
  let collator = new Intl.Collator("en-GB");
  // Compare the sequence of the first and second strings.
  let compareResult = collator.compare("first", "second"); // compareResult = -1

resolvedOptions⁸⁺

resolvedOptions(): CollatorOptions

Returns properties reflecting the locale and collation options of a Collator object.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
CollatorOptions	Properties of the Collator object.

Example

  let collator = new Intl.Collator("zh-Hans", { usage: 'sort', ignorePunctuation: true });
  // Obtain the options of the Collator object.
  let options = collator.resolvedOptions();
  let usage = options.usage; // usage = "sort"
  let ignorePunctuation = options.ignorePunctuation; // ignorePunctuation = true

CollatorOptions⁸⁺

Represents the properties of a Collator object. Since API version 9, the attributes in CollatorOptions are optional.

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
localeMatcher	string	Yes	Yes	Locale matching algorithm. The value can be lookup or best fit. The default value is best fit.
usage	string	Yes	Yes	Whether the comparison is for sorting or for searching. The value can be sort or search. The default value is sort.
sensitivity	string	Yes	Yes	Differences in the strings that lead to non-zero return values. The value can be base, accent, case, or letiant. The default value is variant.
ignorePunctuation	boolean	Yes	Yes	Whether punctuation is ignored. The value can be true or false. The default value is false.
collation	string	Yes	Yes	Rule for sorting regions. The value can be any of the following: big5han, compat, dict, direct, ducet, eor, gb2312, phonebk, phonetic, pinyin, reformed, searchjl, stroke, trad, unihan, zhuyin. The default value is default.
numeric	boolean	Yes	Yes	Whether numeric collation is used. The value can be true or false. The default value is false.
caseFirst	string	Yes	Yes	Whether upper case or lower case is sorted first. The value can be upper, lower, or false. The default value is false.

PluralRules⁸⁺

constructor⁸⁺

constructor()

Creates a PluralRules object to obtain the singular-plural type of numbers.

System capability: SystemCapability.Global.I18n

Example

  // Use the system locale to create a PluralRules object.
  let pluralRules = new Intl.PluralRules();

constructor⁸⁺

constructor(locale: string|Array<string>, options?: PluralRulesOptions)

Creates a PluralRules object to obtain the singular-plural type of numbers.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
locale	string \|Array<string>	Yes	A string containing locale information, including the language, optional script, and region.
options	PluralRulesOptions	No	Options for creating a PluralRules object.

Example

  // Use locale zh-CN to create a PluralRules object. Set localeMatcher to lookup and type to cardinal.
  let pluralRules= new Intl.PluralRules("zh-CN", {"localeMatcher": "lookup", "type": "cardinal"});

select⁸⁺

select(n: number): string

Obtains a string that represents the singular-plural type of the specified number.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
n	number	Yes	Number for which the singular-plural type is to be obtained.

Return value

Type	Description
string	Singular-plural type. The value can be any of the following: zero, one, two, few, many, others.

Example

  // Use locale zh-Hans to create a PluralRules object.
  let zhPluralRules = new Intl.PluralRules("zh-Hans");
  // Determine the singular-plural type corresponding to number 1 in locale zh-Hans.
  let plural = zhPluralRules.select(1); // plural = other

  // Use locale en-US to create a PluralRules object.
  let enPluralRules = new Intl.PluralRules("en-US");
  // Determine the singular-plural type corresponding to number 1 in locale en-US.
  plural = enPluralRules.select(1); // plural = one

PluralRulesOptions⁸⁺

Represents the properties of a PluralRules object. Since API version 9, the attributes in PluralRulesOptions are optional.

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
localeMatcher	string	Yes	Yes	Locale matching algorithm. The value can be lookup or best fit. The default value is best fit.
type	string	Yes	Yes	Sorting type. The value can be cardinal or ordinal. The default value is cardinal.
minimumIntegerDigits	number	Yes	Yes	Minimum number of digits allowed in the integer part of a number. The value ranges from 1 to 21. The default value of is 1.
minimumFractionDigits	number	Yes	Yes	Minimum number of digits in the fraction part of a number. The value ranges from 0 to 20. The default value is 0.
maximumFractionDigits	number	Yes	Yes	Maximum number of digits in the fraction part of a number. The value ranges from 1 to 21. The default value is 3.
minimumSignificantDigits	number	Yes	Yes	Minimum number of the least significant digits. The value ranges from 1 to 21. The default value of is 1.
maximumSignificantDigits	number	Yes	Yes	Maximum number of the least significant digits. The value ranges from 1 to 21. The default value is 21.

RelativeTimeFormat⁸⁺

constructor⁸⁺

constructor()

Creates a RelativeTimeFormat object.

System capability: SystemCapability.Global.I18n

Example

  // Use the system locale to create a RelativeTimeFormat object.
  let relativetimefmt = new Intl.RelativeTimeFormat();

constructor⁸⁺

constructor(locale: string|Array<string>, options?: RelativeTimeFormatInputOptions)

Creates a RelativeTimeFormat object.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
locale	string \|Array<string>	Yes	A string containing locale information, including the language, optional script, and region.
options	RelativeTimeFormatInputOptions	No	Options for creating a RelativeTimeFormat object.

Example

  // Use locale zh-CN to create a RelativeTimeFormat object. Set localeMatcher to lookup, numeric to always, and style to long.
  let relativeTimeFormat = new Intl.RelativeTimeFormat("zh-CN", {"localeMatcher": "lookup", "numeric": "always", "style": "long"});

format⁸⁺

format(value: number, unit: string): string

Formats the value and unit based on the specified locale and formatting options.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
value	number	Yes	Value to format.
unit	string	Yes	Unit to format. The value can be any of the following: year, quarter, month, week, day, hour, minute, second.

Return value

Type	Description
string	Relative time after formatting.

Example

  // Use locale zh-CN to create a RelativeTimeFormat object.
  let relativetimefmt = new Intl.RelativeTimeFormat("zh-CN");
  // Obtain the localized representation (in unit of quarter) of number 3 in locale zh-CN.
  let formatResult = relativetimefmt.format(3, "quarter"); // formatResult = "3 quarters later"

formatToParts⁸⁺

formatToParts(value: number, unit: string): Array<object>

Obtains an array of RelativeTimeFormat objects in parts for locale-aware formatting.

System capability: SystemCapability.Global.I18n

Parameters

Name	Type	Mandatory	Description
value	number	Yes	Value to format.
unit	string	Yes	Unit to format. The value can be any of the following: year, quarter, month, week, day, hour, minute, second.

Return value

Type	Description
Array<object>	An array of RelativeTimeFormat objects in parts.

Example

  // Use locale en to create a RelativeTimeFormat object. Set numeric to auto.
  let relativetimefmt = new Intl.RelativeTimeFormat("en", {"numeric": "auto"});
  let parts = relativetimefmt.formatToParts(10, "seconds"); // parts = [ {type: "literal", value: "in"}, {type: "integer", value: 10, unit: "second"}, {type: "literal", value: "seconds"} ]

resolvedOptions⁸⁺

resolvedOptions(): RelativeTimeFormatResolvedOptions

Obtains the formatting options for RelativeTimeFormat objects.

System capability: SystemCapability.Global.I18n

Return value

Type	Description
RelativeTimeFormatResolvedOptions	Formatting options for RelativeTimeFormat objects.

Example

  // Use locale en-GB to create a RelativeTimeFormat object.
  let relativetimefmt= new Intl.RelativeTimeFormat("en-GB", { style: "short" });
  // Obtain the options of the RelativeTimeFormat object.
  let options = relativetimefmt.resolvedOptions();
  let style = options.style; // style = "short"

RelativeTimeFormatInputOptions⁸⁺

Represents the properties of a RelativeTimeFormat object. Since API version 9, the attributes in RelativeTimeFormatInputOptions are optional.

System capability: SystemCapability.Global.I18n |Name |Type |Readable|Writable|Description | |————-|——|—-|—-|—————————————-| |localeMatcher|string|Yes |Yes |Locale matching algorithm. The value can be lookup or best fit. The default value is best fit.| |numeric |string|Yes |Yes |Format of the output message. The value can be always or auto. The default value is always. | |style |string|Yes |Yes |Length of an internationalized message. The value can be long, short, or narrow. The default value is long.|

RelativeTimeFormatResolvedOptions⁸⁺

Represents the properties of a RelativeTimeFormat object.

System capability: SystemCapability.Global.I18n

Name	Type	Readable	Writable	Description
locale	string	Yes	Yes	A string containing locale information, including the language, optional script, and region.
numeric	string	Yes	Yes	Format of the output message. The value can be always or auto.
style	string	Yes	Yes	Length of an internationalized message. The value can be long, short, or narrow.
numberingSystem	string	Yes	Yes	Numbering system.

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harmony 鸿蒙@ohos.intl (Internationalization)

@ohos.intl (Internationalization)

Modules to Import

Locale

Attributes

constructor8+

constructor

toString

maximize

minimize

LocaleOptions6+

DateTimeFormat

constructor8+

constructor

format

formatRange

resolvedOptions

DateTimeOptions6+

NumberFormat

constructor8+

constructor

format

resolvedOptions

NumberOptions6+

Collator8+

constructor8+

constructor8+

compare8+

resolvedOptions8+

CollatorOptions8+

PluralRules8+

constructor8+

constructor8+

select8+

PluralRulesOptions8+

RelativeTimeFormat8+

constructor8+

constructor8+

format8+

formatToParts8+

resolvedOptions8+

RelativeTimeFormatInputOptions8+

RelativeTimeFormatResolvedOptions8+

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本文目录

constructor⁸⁺

LocaleOptions⁶⁺

constructor⁸⁺

DateTimeOptions⁶⁺

constructor⁸⁺

NumberOptions⁶⁺

Collator⁸⁺

constructor⁸⁺

constructor⁸⁺

compare⁸⁺

resolvedOptions⁸⁺

CollatorOptions⁸⁺

PluralRules⁸⁺

constructor⁸⁺

constructor⁸⁺

select⁸⁺

PluralRulesOptions⁸⁺

RelativeTimeFormat⁸⁺

constructor⁸⁺

constructor⁸⁺

format⁸⁺

formatToParts⁸⁺

resolvedOptions⁸⁺

RelativeTimeFormatInputOptions⁸⁺

RelativeTimeFormatResolvedOptions⁸⁺