Default values of props not reactive

[LoryPelli]

Describe the bug

Default values of props are probably not reactive (length of an array issue)

Reproduction

LoryPelli/npkg@d623c0a

I had to fix it like this

Logs

System Info

I can't do it now sorry, I will add it later

Severity

annoyance

[PatrickG]

Reproduction
Workaround

[phmanu]

Isn't this behaving as expected? With const { x, y = x.length } = $props() you're simply setting the initial value of y. It would be unexpected and probably problematic if y gets automatically updated after that.

[LoryPelli]

Isn't this behaving as expected? With const { x, y = x.length } = $props() you're simply setting the initial value of y. It would be unexpected and probably problematic if y gets automatically updated after that.

Should I use let?

[phmanu]

var/let/const doesn't matter in this case because it's never reassigned

[LoryPelli]

var/let/const doesn't matter in this case because it's never reassigned

It should be re-assigned when I use again the component with different props value

[LoryPelli]

Using the component in two different places

[paoloricciuti]

This is working as expected, once initialized that's just state, not a derived. Thanks for reporting. 🧡