styled-div.jsx

import React from 'react';
import styled from '@emotion/styled';

const StyledDiv = styled.div``;

const App = () => {
  const [randomValue, setRandomValue] = React.useState(0);
  return (
    <React.Fragment>
      {new Array(50).fill(null).map((__, i) => (
        <StyledDiv key={i}>Hello World</StyledDiv>
      ))}
      <button onClick={() => setRandomValue(Math.random())}>Force Rerender</button>
    </React.Fragment>
  );
};