How to use Partial utility type In Typescript
The Partial utility type in typescript contructs a type with all the properties provided type set to optional. This approach is useful where you want t o define an object type where all the properties may or may not be present.
Syntax:
type ObjectWithMatchingProperties<T> = Partial<T>;
Example: The below code makes use of the partial utility type to define generic type of object properties.
type ObjectWithMatchingProperties<T> = Partial<T>;
interface Book {
name: string;
desc: string;
}
type MatchingBookObject =
ObjectWithMatchingProperties<Book>;
const book: MatchingBookObject = {
name: "w3wiki",
desc: "A Computer Science Portal."
};
console.log(book.name);
console.log(book.desc);
Output:
w3wiki
A Computer Science Portal.
How to Define Generic Type for Matching Object Property Types in TypeScript ?
In Typescript, efficiently managing object property types is essential for type safety and code maintainability. Several techniques can be used to define generic types that match the properties of the objects as listed and explained below.
Table of Content
- Using Record Utility Type
- Using Mappped Types
- Using Partial utility type
- Using intersection Operator (`&`)
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