Action parameter type error

[pushkine]

<script lang="ts">
	function action<P extends Partial<{ border: "left" | "right" }>>(_, props: P) {}
	action(null, { border: "right" });
</script>

<div use:action={{ border: 'right' }} />

use:action throws Type 'string' is not assignable to type '"left" | "right"'. ts(2345)
Expected no error, as calling the action in the script block does not throw
{ border: 'right' as const } throws Unexpected token ts(-1)

[dummdidumm]

I am not able to reproduce this.

[pushkine]

I get it in a blank file without any tsconfig, not sure what to say

[jasonlyu123]

I can reproduce it. My guess is that the type parameter of the __sveltets_ensureAction is inferred from the action parameter instead of the type parameter of the action. Thus the error is on the action instead of parameter.

We might need to find another way to transform the action in svelte2tsx.

[dummdidumm]

The "no tsconfig.json" was the key, now I can reproduce it, too. Have another transformation lying around somewhere, need to look it up and see if it solves the issue.