反応:' emptystate 'コンポーネントを作成する

/** EmptyState.js */
import React from "react";
import _ from "lodash";
import styled from "styled-components";

const StyledContainer = styled.div`
  text-align: center;
  width: 100%;
  font-size: 2rem;
  color: lightgrey;
`;

const EmptyState = ({ input, children }) => {
  // matches falsy values as well as empty arrays & objects
  const isEmpty = _.isEmpty(input);

  return isEmpty ? <StyledContainer>Empty</StyledContainer> : children;
};

export default EmptyState;

/** App.js */
import React from "react";
import EmptyState from "./EmptyState";

const App = ({ data }) => {
  return (
    <EmptyState input={data}>
      {data.map((name) => (
        <h3>{name}</h3>
      ))}
    </EmptyState>
  );
};

export default App;