joyent-portal/packages/ui-toolkit/src/header/nav.js

import React from 'react';
import styled, { css } from 'styled-components';
import { Link as BaseLink } from 'react-router-dom';
import { A } from 'normalized-styled-components';
import remcalc from 'remcalc';

const Ul = styled.ul`
  padding: 0;
  margin: 0;
  display: flex;
  list-style: none;
`;

const style = css`
  padding: ${remcalc(15)};
  line-height: ${remcalc(24)};
  font-size: ${remcalc(15)};
  color: ${props => props.theme.white};
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 200ms ease;
  max-height: ${remcalc(53)};
  min-height: ${remcalc(53)};
  box-sizing: border-box;

  &:hover,
  &.active {
    background: rgba(255, 255, 255, 0.15);
  }
`;

const StyledAnchor = A.extend`
  /* trick prettier */
  ${style};
`;

const StyledLink = styled(BaseLink)`
  /* trick prettier */
  ${style};
`;

export const Anchor = ({ children, ...rest }) => {
  const { to = '' } = rest;

  const Views = [() => (to ? StyledLink : null), () => StyledAnchor];
  const View = Views.reduce((sel, view) => (sel ? sel : view()), null);

  return <View {...rest}>{children}</View>;
};

export default ({ children, ...rest }) => <Ul {...rest}>{children}</Ul>;