My current date-time library is dayJS and I am looking to display a comprehensive list of all available time zones.
I attempted to utilize the Intl object for this purpose:
Intl.supportedValuesOf("timeZone")TS2339: Property 'supportedValuesOf' does not exist on type 'typeof Intl'.What is the recommended approach to add the updated types for the Intl object?
Check out the details at https://github.com/microsoft/TypeScript/issues/49231
"the update won't be available until Typescript 5.1 is released"
Encountering the same issue led me to delve deeper into the existing solutions.
If you need to utilize the method Intl.supportedValuesOf() on earlier versions of Typescript before 5.1, you can establish a file named Intl.d.ts (the name is flexible) and insert the following code:
declare namespace Intl {
type Key = "calendar" | "collation" | "currency" | "numberingSystem" | "timeZone" | "unit";
function supportedValuesOf(input: Key): string[];
}
Next, in the tsconfig.json file, include the relative path to the Intl.d.ts file we just generated within the "include" property, as shown below:
{
"compilerOptions": {
...
},
"include": ["/custom/Intl.d.ts"]
}
A restart of your application might be necessary to observe the updates.
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