Looking at the structure of my base type:
type MyForm = {
email: string;
password: string;
}
I'm wondering if there's a possibility to change MyForm into this optional version:
type MyFormOptional = {
email?: string | null;
password?: string | null;
}
Can I achieve this transformation using only MyForm as a starting point?
Indeed, it is possible to define a mapped type that allows for each property to be optional by utilizing the ? mapping modifier, and also includes null as part of each property's type:
type PartialAndNullable<T> =
{ [K in keyof T]?: T[K] | null }
type MyFormOptional = PartialAndNullable<MyForm>
/* type MyFormOptional = {
email?: string | null;
password?: string | null;
} */
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