A concise, typesafe lens implementation in TypeScript

lens.ts

interface INamed<T> {
  name: T
}

export const Name = {
  get<T>(named: INamed<T>) {
    return named.name
  },
  set<T>(named: INamed<T>, value: T) {
    return {
      ...named,
      name: value,
    }
  },
}

const person = {
  name: 'Ben',
  age: 26,
}

console.log(Name.get(person))
console.log(Name.get(Name.set(person, 'Ian')))