After I install @fluentui/react, I try to use grid like this doc https://developer.microsoft.com/en-us/fluentui#/styles/web/layout
ReactDOM.render(
<React.StrictMode>
<div className="ms-Grid" dir="ltr">
<div className="ms-Grid-row">
<div className="ms-Grid-col ms-sm4 ms-xl4">A</div>
<div className="ms-Grid-col ms-sm8 ms-xl8">B</div>
</div>
</div>
</React.StrictMode>,
document.getElementById('root')
);
But It does not work,other control components work just fine. Did I miss something?
Their docs only mention npm package.