Lazy

_lazyValue

Based on: https://github.com/sindresorhus/lazy-value

const value = _lazyValue(() => expensiveComputation())

value() // calls expensiveComputation() once
value() // returns cached result
value() // returns cached result

_defineLazyProperty

Based on: https://github.com/sindresorhus/define-lazy-prop

interface Obj {
  v: number
}

const obj = {} as Obj

_defineLazyProperty(obj, 'v', () => expensiveComputation())
obj.v // runs expensiveComputation() once
obj.v // cached value
obj.v // cached value

_defineLazyProps

Like _defineLazyProperty, but allows to define multiple props at once.