Do we support auto layout in office Fabric React - Grid layout

[taxiahou]

Hi, team,

i am using ms-grid to implement a grid layout.
Noticed that if i don't specify column width, even if one row has one column, i will not get full width.
Is it by design or i miss anything here?

<div class="ms-Grid" dir="ltr">
  <div class="ms-Grid-row">
    <div class="ms-Grid-col">
      test
    </div>
  </div>
</div>