| // Copyright (C) 2021 André Bargull. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-intl.supportedvaluesof |
| description: > |
| The returned "timeZone" values can be used with DateTimeFormat. |
| info: | |
| Intl.supportedValuesOf ( key ) |
| |
| 1. Let key be ? ToString(key). |
| ... |
| 6. Else if key is "timeZone", then |
| a. Let list be ! AvailableTimeZones( ). |
| ... |
| 9. Return ! CreateArrayFromList( list ). |
| |
| AvailableTimeZones () |
| The AvailableTimeZones abstract operation returns a sorted List of supported |
| Zone and Link names in the IANA Time Zone Database. The following steps are |
| taken: |
| |
| 1. Let names be a List of all supported Zone and Link names in the IANA Time |
| Zone Database. |
| 2. Let result be a new empty List. |
| 3. For each element name of names, do |
| a. Assert: ! IsValidTimeZoneName( name ) is true. |
| b. Let canonical be ! CanonicalizeTimeZoneName( name ). |
| c. If result does not contain an element equal to canonical, then |
| i. Append canonical to the end of result. |
| 4. Sort result in order as if an Array of the same values had been sorted using |
| %Array.prototype.sort% using undefined as comparefn. |
| 5. Return result. |
| locale: [en] |
| features: [Intl-enumeration] |
| ---*/ |
| |
| const timeZones = Intl.supportedValuesOf("timeZone"); |
| |
| for (let timeZone of timeZones) { |
| let obj = new Intl.DateTimeFormat("en", {timeZone}); |
| assert.sameValue(obj.resolvedOptions().timeZone, timeZone, |
| `${timeZone} is supported by DateTimeFormat`); |
| } |
