Render Props typescript

RenderProps.tsx

import * as React from 'react';

interface NameProviderProps {
  children: (state: NameProviderState) => React.ReactNode;
}

interface NameProviderState {
  readonly name: string;
}

export class NameProvider extends React.Component<NameProviderProps, NameProviderState> {
  readonly state: NameProviderState = { name: 'Piotr' };

  render() {
    return this.props.children(this.state);
  }
}