[useButton] Stop setting type on non-native buttons

[chuganzy]

This is a minor PR to avoid passing type={undefined} from useButton when nativeButton is false.

Previously, custom non-native button renderers could receive an unnecessary type prop:

import { Button } from "@base-ui/react/button";

function App() {
  return <Button render={<CustomButton />} nativeButton={false} />
}


function CustomButton(props) {
  // Previously props included type={undefined}
  return <span {...props} />
}

• I have followed (at least) the PR section of the contributing guide.

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/react@4819
  

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/utils@4819
  

commit: 3174795

[code-infra-dashboard]

Bundle size

Bundle	Parsed size	Gzip size
@base-ui/react	▼-14B(0.00%)	▼-7B(0.00%)

Details of bundle changes

Performance

Total duration: 1,181.99 ms +89.84 ms^(+8.2%) | Renders: 50 ⁽⁺⁰⁾ | Paint: 1,819.52 ms +155.74 ms^(+9.4%)

Test	Duration	Renders
Menu mount (300 instances)	145.22 ms 🔺+28.57 ms(+24.5%)	2 (+0)
Menu open (500 items)	84.15 ms 🔺+21.86 ms(+35.1%)	12 (+0)

10 tests within noise — details

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[atomiks]

Thanks for the fix @chuganzy