redux-devtools/extension/examples/todomvc/components/Header.js

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import TodoTextInput from './TodoTextInput';

class Header extends Component {
  handleSave(text) {
    if (text.length !== 0) {
      this.props.addTodo(text);
    }
  }

  render() {
    return (
      <header className="header">
        <h1>todos</h1>
        <TodoTextInput
          newTodo
          onSave={this.handleSave.bind(this)}
          placeholder="What needs to be done?"
        />
      </header>
    );
  }
}

Header.propTypes = {
  addTodo: PropTypes.func.isRequired,
};

export default Header;