storybook/code/renderers/html/template/cli/js/Header.js

import './header.css';
import { createButton } from './Button';

export const createHeader = ({ user, onLogout, onLogin, onCreateAccount }) => {
  const header = document.createElement('header');

  const wrapper = document.createElement('div');
  wrapper.className = 'wrapper';

  const logo = `<div>
    <svg width="32" height="32" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg">
      <g fill="none" fillRule="evenodd">
        <path
          d="M10 0h12a10 10 0 0110 10v12a10 10 0 01-10 10H10A10 10 0 010 22V10A10 10 0 0110 0z"
          fill="#FFF" />
        <path
          d="M5.3 10.6l10.4 6v11.1l-10.4-6v-11zm11.4-6.2l9.7 5.5-9.7 5.6V4.4z"
          fill="#555AB9" />
        <path d="M27.2 10.6v11.2l-10.5 6V16.5l10.5-6zM15.7 4.4v11L6 10l9.7-5.5z" fill="#91BAF8" />
      </g>
    </svg>
    <h1>Acme</h1>
  </div>`;

  wrapper.insertAdjacentHTML('afterbegin', logo);

  const account = document.createElement('div');
  if (user) {
    const welcomeMessage = `<span class="welcome">Welcome, <b>${user.name}</b>!</span>`;
    account.innerHTML = welcomeMessage;
    account.appendChild(createButton({ size: 'small', label: 'Log out', onClick: onLogout }));
  } else {
    account.appendChild(createButton({ size: 'small', label: 'Log in', onClick: onLogin }));
    account.appendChild(
      createButton({
        size: 'small',
        label: 'Sign up',
        onClick: onCreateAccount,
        primary: true,
      })
    );
  }
  wrapper.appendChild(account);
  header.appendChild(wrapper);

  return header;
};