I have an object and it's typed
interface formDataType {
tesla: {
made: string
},
ford: {
made: string
}
}
const formData: formDataType = {
"tesla": {
"made":"2021"
},
"ford": {
"made": "2022"
}
};
then I've a function where its argument is one of [string]:{made: string}, how can I use back formDataType? is there something like objectOf formDataType?
You can create a type to use in your FormDataType, then reuse that type in your function:
type VehicleDetails = { made: string };
type FormDataType = {
ford: VehicleDetails;
tesla: VehicleDetails;
};
// The following is the same type, written using the Record utility:
// type FormDataType = Record<'ford' | 'tesla', VehicleDetails>;
const formData: FormDataType = {
tesla: {made: '2021'},
ford: {made: '2022'},
};
function doSomethingWithVehicleDetails (details: VehicleDetails) {
// console.log(details);
}
Update in response to your comment:
You can also derive a union of all the types of the values of the keys in your FormData type (and if they're all the same type, the union will effectively be that one type):
type FormDataType = {
ford: { made: string };
tesla: { made: string };
};
type VehicleDetails = FormDataType[keyof FormDataType];
function doSomethingWithVehicleDetails (details: VehicleDetails) {
// console.log(details);
}