Nullable type

[Ghost-str]

Type description + examples

Set null for each property of object
It can be useful in React because the framework determines the component type by value (controlled and uncontrolled).

type SomeEntity = {
 foo: string;
 bar: string;
};

type FormState = Nullable<SomeEntity>;

const SomeInitialState: FormState = {
 foo: null,
 bar: null
} 

Type source

type Nullable<T extends object> = { [K in keyof T]: T[K] | null };

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• I tried my best to look for it

[fregante]

"Nullable" sounds like the opposite of NonNullable, which drops null | undefined from X | null | undefined https://www.typescriptlang.org/docs/handbook/utility-types.html#nonnullabletype

What you're suggesting sounds like Partial, except it accepts null: https://www.typescriptlang.org/docs/handbook/utility-types.html#partialtype

But… sindresorhus/meta#7