Change the type of the given keys

ChangeTypeOfKeys.ts

export type ChangeTypeOfKey<T, K extends keyof T, H> = {
  [Key in keyof T]: Key extends K ? H : T[Key];
};
  
type K = {id:string, name:string, date:string}
type KL = ChangeTypeOfKey<K, 'id', string | null> 
// ^? {id:string|null, name:string}
  
    
type E = {id:string, name:string, date:string}
type EL = ChangeTypeOfKey<K, 'id'|'name', boolean> 
// ^?  {id:boolean, name:boolean, date:string}

https://www.typescriptlang.org/play?#code/KYDwDg9gTgLgBDAnmYcDCALAhgOwObAAqywA8gGYDSwiAPIQDRyVygzA4AmAznANY0I5OIzgAJAHxwAvHADeAKDhwA2tURwAljn6DhhALoAuZjVYh2XXiwD84uCcJqaBgNwKAvu+UKkKZjLympxG3DBQ2nhMOFgAtsCh4ZFMnFjsiRH4Hr4kzAAygZi4BMQoFOq0lEwA5MHVTGGZeHAAPnA4AK4ANl1SCgD0-XAAenZywRmRLZ090XEJjZHZPso+fqgAooHjIYv4c-GT+3Cp6Xt42etwGwWyRfhEJOU0lTV1LdUx8fVwAEYQEC6wFwfUGIzsQRC-0BwJwBwS0KBuBSaQWSSyQA

Could also be done with a combination of Omit and &. Basically removing a key and then adding it with a different type.