TypeScript Deep Dive - Index Types / Mapped Types | JSer - Front-End Interview questions
https://www.typescriptlang.org/docs/h...
Mapped Types are very important, it works like a map function, which `in` is used to iterate all the possible keys.
Hi I'm a JavaScript engineer who is not good at algorithms,
and currently practicing leetCode & BFE.dev. If you are interested, maybe we can learn together.