CSS Style change when hovering over another div

Question

I want .help-icon-wrapper to change background-color when hovering over .help-dropdown-item. How can I do this in Javascript?

<div class="help-icon-container">
  <div class="help-icon-wrapper" id="component-icon-wrapper">
    <i class="fas fa-th help-icon"></i>
  </div>

  <ul class="help-dropdown-content">
    <li class="help-dropdown-item" routerLink="/dashboard">
      <i class="fas fa-chart-line header-icon"></i>
      <span class="app-dropdown-item-name">Dashboard</span>
    </li>
  </ul>
</div>