cinny/src/app/atoms/math/Math.jsx

import React, { useEffect, useRef } from 'react';
import PropTypes from 'prop-types';

import katex from 'katex';
import 'katex/dist/katex.min.css';

import 'katex/dist/contrib/copy-tex';
import 'katex/dist/contrib/copy-tex.css';

const Math = React.memo(({
  content, throwOnError, errorColor, displayMode,
}) => {
  const ref = useRef(null);

  useEffect(() => {
    katex.render(content, ref.current, { throwOnError, errorColor, displayMode });
  }, [content, throwOnError, errorColor, displayMode]);

  return <span ref={ref} />;
});
Math.defaultProps = {
  throwOnError: null,
  errorColor: null,
  displayMode: null,
};
Math.propTypes = {
  content: PropTypes.string.isRequired,
  throwOnError: PropTypes.bool,
  errorColor: PropTypes.string,
  displayMode: PropTypes.bool,
};

export default Math;