In my current project, I am using typescript and working on defining an interface that has the following structure:
interface SelectProps<T> {
options: T[];
labelKey: keyof T;
valueKey: keyof T;
}
The type T in this interface can vary in shape, but it must have label and key properties that are both strings. I want to ensure that T[labelKey] and T[valueKey] are always strings. How can I achieve this?
define Option<A extends string, B extends string> =
Record<string, any> & Record<A | B, string>
interface SelectOptions<A extends string, B extends string> {
choices: Option<A, B>[];
label: A;
value: B;
}
const selection: SelectOptions<'alpha', 'beta'> = {
choices: [{ alpha: '', beta: '', extra: 3 }],
label: 'alpha',
value: 'beta'
}
If you're looking for a straightforward approach, one way to accomplish this is by establishing a foundational interface and then proceeding as outlined below:
interface CoreSelectAttributes {
valueIdentifier: string;
displayLabel: string;
}
interface CustomSelectAttributes<T extends CoreSelectAttributes> {
choices: T[];
}
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