Leveraging TypeScript Record for creating a limited set of object keys

Question

Leveraging TypeScript Record for creating a limited set of object keys

Is it feasible to create a Record that maps selected keys from one object to another? I am attempting to map Google's libphonenumberCountryCode options to my custom formatting objects. Currently, I have:

const countryOptions: Record<CountryCode, CountryFormat> = {
  'US': {
    //... my CountryFormat object
  },
  //...
}

The issue is that I must define all keys in CountryCode (around 240) even though I only use a fraction of them. Is there a way to modify this record type to target specific keys within CountryCode?

typescript

Answer 1

Answer №1

To ensure that all properties are optional, you can utilize the Partial built-in utility type:

const countryOptions: Partial<Record<CountryCode, CountryFormat>> = {
  'US': {
    //... my CountryFormat object
  },
  //...
}

This implementation will make all properties within the object optional.

Answer 2

To ensure that all properties are optional, you can utilize the Partial built-in utility type:

const countryOptions: Partial<Record<CountryCode, CountryFormat>> = {
  'US': {
    //... my CountryFormat object
  },
  //...
}

This implementation will make all properties within the object optional.

Answer 3

Answer №2

To avoid using a Record, consider utilizing a Map with country codes as keys.

countryOptions: new Map<string, CountryFormat>([
    ["US", {
        //... information about US
    }],
    ["UK", {
        //... information about UK
    }],
    //...
]);

Answer 4

To avoid using a Record, consider utilizing a Map with country codes as keys.

countryOptions: new Map<string, CountryFormat>([
    ["US", {
        //... information about US
    }],
    ["UK", {
        //... information about UK
    }],
    //...
]);

Leveraging TypeScript Record for creating a limited set of object keys

Answer №1

Answer №2

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