meal_planner/src/pages/CategoryList.js

import React, { useEffect } from "react";
import CategoryEntry from "../components/CategoryEntry";

const CategoryListPage = props => {
  const { categories } = props.categories;
  const { getCategories } = props;

  useEffect(() => {
    getCategories();
  }, []);

  return (
    <div className="section">
      <div className="container">
        <h1>The Chef's Meal Categories</h1>
        <ul>
          {categories.map((category, i) => (
            <CategoryEntry i={i} category={category} />
          ))}
        </ul>
      </div>
    </div>
  );
};

export default CategoryListPage;