<Button variant='outlined'>test</Button>
Have no effect.And the Console output a warning! Like:

Need I update local material-ui version? And how to update?
As of https://material-ui-next.com/getting-started/installation/
Use @material-ui/core instead of material-ui@next
I think it's the v1.0.0 not updated to npm, so your version in package.json is ^1.0.0-beta.47 right?
You can using '@material-ui/core' instead of material-ui like @xemasiv I think.
@brainysoon my version in package.json is ^1.0.0-beta.44, Should I executive command npm install @material-ui/core --S?
@xemasiv my local project have installed material-ui@next npm packages already. So锛宨f I executive command npm install @material-ui/core --S again, there are any effects to my project ?
Initially, not yet. But as soon as you replace your imports, you might see some breaks in your code since some changes have definitely been made in the recent material-ui package releases.
e.g. Your typography import will now be:
import Typography from '@material-ui/core/Typography';
Nothing much to worry about though, if there were any changes, they are definitely only minor ones.
And on top of it, after successfully replacing your imports, you may now confidently use the current documentation without worries. :100:
@xemasiv thanks!
@WACCYZ Please follow the release notes for breaking changes. There is even a codemod script to change your imports for you.
Most helpful comment
Initially, not yet. But as soon as you replace your imports, you might see some breaks in your code since some changes have definitely been made in the recent material-ui package releases.
e.g. Your typography import will now be:
import Typography from '@material-ui/core/Typography';Nothing much to worry about though, if there were any changes, they are definitely only minor ones.
And on top of it, after successfully replacing your imports, you may now confidently use the current documentation without worries. :100: