Type Alias ReadonlyProperties<T>

ReadonlyProperties: Pick<T, ReadonlyPropertyKeys<T>>

Projects T to an object containing only its readonly properties.

Explicit readonly modifiers, getter-only accessors, optional modifiers, and property value types are preserved.

Type Parameters

T extends object
Object type to project.

Example

interface Example
{
   value: number;
   readonly id: string;
   readonly created?: Date;
}

type Result = ReadonlyProperties<Example>;

// {
//    readonly id: string;
//    readonly created?: Date;
// }