Array.isArray and proxies

[matths]

Hi! To be honest, I am not a big fan of Svelte 5 Runes and did enjoy the simplicity of $:reactivity in Svelte3/4.
So I am working with Svelte on a daily basis and we have a code base mainly using 3/4 syntax. Now the first components use Svelte 5 Runes but have to work with former Svelte 4 components (composition).

So it came as it had to come and over a bind:value attribute I've got a Proxy(Array) instead of an Array. My former code checked for an Array using Array.isArray, but this obviously fails. What can I do about it?

[brunnerh]

The nuclear option would be to $state.snapshot before the check (which creates a full copy of the object), but depending on what the check is for and what types there can be, you maybe could use something else like just checking for the length property instead.

[matths]

I think you're right. The compiler takes care of the "dot" properties I think. I'll try that.