Here is the interface I am working with:
interface Address {
street: string
town: string
country: string
}
I am looking to create a function that takes in a specific key parameter which must be one of three strings:
function useKey(key: "street" | "town" | "country") {
}
Is it possible to dynamically generate the type for the key parameter based on the interface?
When dealing with TypeScript, the keyof type operator comes in handy for situations like this:
function retrieveKey(key: keyof Contact) {
}
Using this will provide you with all the public keys associated with a specific type.
You can also utilize type queries to access the type of the field:
function fetchValue<K extends keyof Contact>(key: K): Contact[K]{
//...
}
To access keys in TypeScript, you can utilize the keyof operator:
type AddressKey = keyof Address
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