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| 1 | +draft_date: 2025-06-25 |
| 2 | +name: ECMAScript® 2026 Internationalization API Specification |
| 3 | +description: TODO |
| 4 | +spec: https://tc39.es/ecma402/ |
| 5 | +compat_features: |
| 6 | + - javascript.builtins.Intl.supportedValuesOf.key_parameter_calendar |
| 7 | + - javascript.builtins.Intl.supportedValuesOf.key_parameter_collation |
| 8 | + - javascript.builtins.Intl.supportedValuesOf.key_parameter_currency |
| 9 | + - javascript.builtins.Intl.supportedValuesOf.key_parameter_numberingSystem |
| 10 | + - javascript.builtins.Intl.supportedValuesOf.key_parameter_timeZone |
| 11 | + - javascript.builtins.Intl.supportedValuesOf.key_parameter_unit |
| 12 | + |
| 13 | +# The following features in the spec are already part of web-features: |
| 14 | +# - Intl: |
| 15 | +# - javascript.builtins.Array.toLocaleString |
| 16 | +# - javascript.builtins.Array.toLocaleString.locales_parameter |
| 17 | +# - javascript.builtins.Array.toLocaleString.options_parameter |
| 18 | +# - javascript.builtins.BigInt.toLocaleString |
| 19 | +# - javascript.builtins.BigInt.toLocaleString.locales_parameter |
| 20 | +# - javascript.builtins.BigInt.toLocaleString.options_parameter |
| 21 | +# - javascript.builtins.Date.toLocaleDateString |
| 22 | +# - javascript.builtins.Date.toLocaleDateString.iana_time_zone_names |
| 23 | +# - javascript.builtins.Date.toLocaleDateString.locales_parameter |
| 24 | +# - javascript.builtins.Date.toLocaleDateString.options_parameter |
| 25 | +# - javascript.builtins.Date.toLocaleString |
| 26 | +# - javascript.builtins.Date.toLocaleString.iana_time_zone_names |
| 27 | +# - javascript.builtins.Date.toLocaleString.locales_parameter |
| 28 | +# - javascript.builtins.Date.toLocaleString.options_parameter |
| 29 | +# - javascript.builtins.Date.toLocaleTimeString |
| 30 | +# - javascript.builtins.Date.toLocaleTimeString.iana_time_zone_names |
| 31 | +# - javascript.builtins.Date.toLocaleTimeString.locales_parameter |
| 32 | +# - javascript.builtins.Date.toLocaleTimeString.options_parameter |
| 33 | +# - javascript.builtins.Intl |
| 34 | +# - javascript.builtins.Intl.Collator |
| 35 | +# - javascript.builtins.Intl.Collator.Collator |
| 36 | +# - javascript.builtins.Intl.Collator.Collator.options_caseFirst_parameter |
| 37 | +# - javascript.builtins.Intl.Collator.Collator.options_collation_parameter |
| 38 | +# - javascript.builtins.Intl.Collator.Collator.options_ignorePunctuation_parameter |
| 39 | +# - javascript.builtins.Intl.Collator.Collator.options_localeMatcher_parameter |
| 40 | +# - javascript.builtins.Intl.Collator.Collator.options_numeric_parameter |
| 41 | +# - javascript.builtins.Intl.Collator.Collator.options_sensitivity_parameter |
| 42 | +# - javascript.builtins.Intl.Collator.Collator.options_usage_parameter |
| 43 | +# - javascript.builtins.Intl.Collator.compare |
| 44 | +# - javascript.builtins.Intl.Collator.resolvedOptions |
| 45 | +# - javascript.builtins.Intl.Collator.supportedLocalesOf |
| 46 | +# - javascript.builtins.Intl.DateTimeFormat |
| 47 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat |
| 48 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.IntlLegacyConstructedSymbol |
| 49 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.locales_parameter |
| 50 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter |
| 51 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_calendar_parameter |
| 52 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dateStyle_parameter |
| 53 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dayPeriod_parameter |
| 54 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_fractionalSecondDigits_parameter |
| 55 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_hourCycle_parameter |
| 56 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_numberingSystem_parameter |
| 57 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeStyle_parameter |
| 58 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter |
| 59 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter.extended_values |
| 60 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter |
| 61 | +# - javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter.iana_time_zones |
| 62 | +# - javascript.builtins.Intl.DateTimeFormat.format |
| 63 | +# - javascript.builtins.Intl.DateTimeFormat.formatRange |
| 64 | +# - javascript.builtins.Intl.DateTimeFormat.formatRangeToParts |
| 65 | +# - javascript.builtins.Intl.DateTimeFormat.formatToParts |
| 66 | +# - javascript.builtins.Intl.DateTimeFormat.resolvedOptions |
| 67 | +# - javascript.builtins.Intl.DateTimeFormat.resolvedOptions.computed_timezone |
| 68 | +# - javascript.builtins.Intl.DateTimeFormat.supportedLocalesOf |
| 69 | +# - javascript.builtins.Intl.NumberFormat |
| 70 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat |
| 71 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.IntlLegacyConstructedSymbol |
| 72 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.locales_parameter |
| 73 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter |
| 74 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_compactDisplay_parameter |
| 75 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencyDisplay_parameter |
| 76 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencySign_parameter |
| 77 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currency_parameter |
| 78 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_localeMatcher_parameter |
| 79 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumFractionDigits_parameter |
| 80 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumSignificantDigits_parameter |
| 81 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumFractionDigits_parameter |
| 82 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumIntegerDigits_parameter |
| 83 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumSignificantDigits_parameter |
| 84 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_notation_parameter |
| 85 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_numberingSystem_parameter |
| 86 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingIncrement_parameter |
| 87 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingMode_parameter |
| 88 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingPriority_parameter |
| 89 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter |
| 90 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter.negative |
| 91 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_style_parameter |
| 92 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_trailingZeroDisplay_parameter |
| 93 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unitDisplay_parameter |
| 94 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unit_parameter |
| 95 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter |
| 96 | +# - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter.string_values |
| 97 | +# - javascript.builtins.Intl.NumberFormat.format |
| 98 | +# - javascript.builtins.Intl.NumberFormat.format.number_parameter-string_decimal |
| 99 | +# - javascript.builtins.Intl.NumberFormat.formatRange |
| 100 | +# - javascript.builtins.Intl.NumberFormat.formatRangeToParts |
| 101 | +# - javascript.builtins.Intl.NumberFormat.formatToParts |
| 102 | +# - javascript.builtins.Intl.NumberFormat.resolvedOptions |
| 103 | +# - javascript.builtins.Intl.NumberFormat.supportedLocalesOf |
| 104 | +# - javascript.builtins.Intl.getCanonicalLocales |
| 105 | +# - javascript.builtins.Intl.supportedValuesOf |
| 106 | +# - javascript.builtins.Number.toLocaleString |
| 107 | +# - javascript.builtins.Number.toLocaleString.locales_parameter |
| 108 | +# - javascript.builtins.Number.toLocaleString.options_parameter |
| 109 | +# - javascript.builtins.String.localeCompare |
| 110 | +# - javascript.builtins.String.localeCompare.locales_parameter |
| 111 | +# - javascript.builtins.String.localeCompare.options_parameter |
| 112 | +# - javascript.builtins.String.toLocaleLowerCase |
| 113 | +# - javascript.builtins.String.toLocaleLowerCase.locales_parameter |
| 114 | +# - javascript.builtins.String.toLocaleUpperCase |
| 115 | +# - javascript.builtins.String.toLocaleUpperCase.locales_parameter |
| 116 | +# - Intl.DisplayNames: |
| 117 | +# - javascript.builtins.Intl.DisplayNames |
| 118 | +# - javascript.builtins.Intl.DisplayNames.DisplayNames |
| 119 | +# - javascript.builtins.Intl.DisplayNames.of |
| 120 | +# - javascript.builtins.Intl.DisplayNames.resolvedOptions |
| 121 | +# - javascript.builtins.Intl.DisplayNames.supportedLocalesOf |
| 122 | +# - Intl.ListFormat: |
| 123 | +# - javascript.builtins.Intl.ListFormat |
| 124 | +# - javascript.builtins.Intl.ListFormat.ListFormat |
| 125 | +# - javascript.builtins.Intl.ListFormat.format |
| 126 | +# - javascript.builtins.Intl.ListFormat.formatToParts |
| 127 | +# - javascript.builtins.Intl.ListFormat.resolvedOptions |
| 128 | +# - javascript.builtins.Intl.ListFormat.supportedLocalesOf |
| 129 | +# - Intl.Locale: |
| 130 | +# - javascript.builtins.Intl.Locale |
| 131 | +# - javascript.builtins.Intl.Locale.Locale |
| 132 | +# - javascript.builtins.Intl.Locale.baseName |
| 133 | +# - javascript.builtins.Intl.Locale.calendar |
| 134 | +# - javascript.builtins.Intl.Locale.caseFirst |
| 135 | +# - javascript.builtins.Intl.Locale.collation |
| 136 | +# - javascript.builtins.Intl.Locale.hourCycle |
| 137 | +# - javascript.builtins.Intl.Locale.language |
| 138 | +# - javascript.builtins.Intl.Locale.maximize |
| 139 | +# - javascript.builtins.Intl.Locale.minimize |
| 140 | +# - javascript.builtins.Intl.Locale.numberingSystem |
| 141 | +# - javascript.builtins.Intl.Locale.numeric |
| 142 | +# - javascript.builtins.Intl.Locale.region |
| 143 | +# - javascript.builtins.Intl.Locale.script |
| 144 | +# - javascript.builtins.Intl.Locale.toString |
| 145 | +# - Intl.PluralRules: |
| 146 | +# - javascript.builtins.Intl.PluralRules |
| 147 | +# - javascript.builtins.Intl.PluralRules.PluralRules |
| 148 | +# - javascript.builtins.Intl.PluralRules.PluralRules.options_parameter |
| 149 | +# - javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingIncrement_parameter |
| 150 | +# - javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingMode_parameter |
| 151 | +# - javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingPriority_parameter |
| 152 | +# - javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_trailingZeroDisplay_parameter |
| 153 | +# - javascript.builtins.Intl.PluralRules.resolvedOptions |
| 154 | +# - javascript.builtins.Intl.PluralRules.select |
| 155 | +# - javascript.builtins.Intl.PluralRules.selectRange |
| 156 | +# - javascript.builtins.Intl.PluralRules.supportedLocalesOf |
| 157 | +# - Intl.RelativeTimeFormat: |
| 158 | +# - javascript.builtins.Intl.RelativeTimeFormat |
| 159 | +# - javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat |
| 160 | +# - javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.locales_parameter |
| 161 | +# - javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_localeMatcher_parameter |
| 162 | +# - javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numberingSystem_parameter |
| 163 | +# - javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numeric_parameter |
| 164 | +# - javascript.builtins.Intl.RelativeTimeFormat.format |
| 165 | +# - javascript.builtins.Intl.RelativeTimeFormat.formatToParts |
| 166 | +# - javascript.builtins.Intl.RelativeTimeFormat.resolvedOptions |
| 167 | +# - javascript.builtins.Intl.RelativeTimeFormat.supportedLocalesOf |
| 168 | +# - Intl.Segmenter: |
| 169 | +# - javascript.builtins.Intl.Segmenter |
| 170 | +# - javascript.builtins.Intl.Segmenter.Segmenter |
| 171 | +# - javascript.builtins.Intl.Segmenter.resolvedOptions |
| 172 | +# - javascript.builtins.Intl.Segmenter.segment |
| 173 | +# - javascript.builtins.Intl.Segmenter.supportedLocalesOf |
| 174 | +# - javascript.builtins.Intl.Segments |
| 175 | +# - javascript.builtins.Intl.Segments.@@iterator |
| 176 | +# - javascript.builtins.Intl.Segments.containing |
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