RadioItem with empty value not selectable

[rudiv]

Describe the bug

It appears to be impossible to select an empty value within a DropdownMenu's RadioGroup.

I'm assuming this is related to this piece of code, specifically testing if (next ..., as an undefined or null or '' would fail this test and result in the value change not running.

Whilst maybe not a bug, it is annoying when using the radio group for an optional filter, where it's expected that "no filter" would be a state of "undefined".

Reproduction

let whatever: any = undefined;
// .. 
<DropdownMenu.RadioGroup bind:value={whatever}>
    <DropdownMenu.RadioItem value={undefined}>All</DropdownMenu.RadioItem>
    <DropdownMenu.RadioItem value="1234">1234</DropdownMenu.RadioItem>
</DropdownMenu.RadioGroup>

Logs

No response

System Info

System:
    OS: macOS 14.2.1
    CPU: (20) arm64 Apple M1 Ultra
    Memory: 93.30 GB / 128.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.10.0 - /usr/local/bin/node
    npm: 10.2.3 - /usr/local/bin/npm
  Browsers:
    Safari: 17.2.1
  npmPackages:
    @sveltejs/kit: ^2.5.0 => 2.5.0 
    bits-ui: ^0.18.1 => 0.18.1 
    svelte: ^4.2.10 => 4.2.10

Severity

annoyance

[huntabyte]

You are now able to use an empty string here! My apologies for the oversight on the conditional!