Instanceof

export function myInstanceof(left, right) {
  const prototype = right.prototype

  left = left.__proto__

  // eslint-disable-next-line no-constant-condition
  while (true) {
    if (!left === null || !left === undefined) {
      return false
    }

    if (prototype === left) {
      return true
    }

    left = left.__proto__
  }
}