old_contents: import { h } from 'preact'
  import Constants from '../constants/Constants'
  import normalizeDate from '../helpers/normalize-date'
  
  const Nav = (props) => {
    let date = props.date
    let disableNext = false, disablePrevious = false
    if (date >= Constants.LATEST_DAY)
      disableNext = true
    if (date <= Constants.OLDEST_DAY)
      disablePrevious = true
  
    return (
      <div class="nav-wrapper">
        <h1 class="title">THE POD</h1>
        <nav class="nav nav-center">
          <ul class="menu">
            <li>
              <button type="submit" class="btn" disabled={disablePrevious}
                      onClick={props.onPreviousClick}>
                Previous
              </button>
            </li>
            <li>
              <button type="submit" class="btn"
                onClick={props.onRandomClick}>
                Random</button>
            </li>
            <li>
              <button type="submit" class="btn" disabled={disableNext}
                      onClick={props.onNextClick}>
                Next
              </button>
            </li>
          </ul>
        </nav>
        <nav class="nav nav-right">
          <ul class="menu">
            <li>
              <button type="submit" class="btn"
                      onClick={props.onToggleClick}>
                Toggle
              </button>
            </li>
          </ul>
        </nav>
  
      </div>
    )
  }
  
  export default Nav
  
new_contents: import { h } from 'preact'
  import Constants from '../constants/Constants'
  import normalizeDate from '../helpers/normalize-date'
  
  const Nav = (props) => {
    let date = props.date
    let disableNext = false, disablePrevious = false
    if (date >= Constants.LATEST_DAY)
      disableNext = true
    if (date <= Constants.OLDEST_DAY)
      disablePrevious = true
  
    return (
      <div class="nav-wrapper">
        <h1 class="title">THE POD</h1>
        <nav class="nav nav-center">
          <ul class="menu">
            <li>
              <button type="submit" class="btn" disabled={disablePrevious}
                      onClick={props.onPreviousClick}>
                Previous
              </button>
            </li>
            <li>
              <button type="submit" class="btn"
                onClick={props.onRandomClick}>
                Random</button>
            </li>
            <li>
              <button type="submit" class="btn" disabled={disableNext}
                      onClick={props.onNextClick}>
                Next
              </button>
            </li>
          </ul>
        </nav>
        <nav class="nav nav-right">
          <ul class="menu">
            <li>
              <button type="submit" class="btn"
                      onClick={props.onToggleClick}>
                Toggle info
              </button>
            </li>
          </ul>
        </nav>
  
      </div>
    )
  }
  
  export default Nav
  
subject: update label