Category: TypeScript

Everyday Types

Post author By Yujin Wang
Post date November 6, 2024
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https://www.typescriptlang.org/docs/handbook/2/everyday-types.html

Type narrowing

Post author By Yujin Wang
Post date April 28, 2023
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In TypeScript, type narrowing is the removal of types from a union. To narrow a variable to a specific type, we use the type guard. typeof Return values: Another check for array: Array.isArray() “in” operator JavaScript has an operator for determining if an object has a property with a name: the in operator. instanceof Type Predicates To define […]