outroing if_blocks cannot receive updates

[pushkine]

outroing if_blocks will not receive any update from the tick they get outroed on
render_simple :
https://svelte.dev/repl/3abed636ab2d456882e49b1db35c677f?version=3.20.1
render_compound :
https://svelte.dev/repl/5e950ff7951f4afc9b627aa9832fae5b?version=3.20.1

render_simple does have the following comment in the compiler

// no `p()` here — we don't want to update outroing nodes,
// as that will typically result in glitching

it's been there since the initial commit 2 years ago

I don't really see why it couldn't be fixed, might give it a try in a few days

[furudean]

I ran into this today. I'm trying to conditionally set a class to play a "completion" animation as a fade out starts, but the class never gets set as described by this bug.

{#if $isVisible}
  <div
    class="loading-progress"
    class:finished={$isVisible === false}
    out:fade={{ delay: 600 }}
  />
{/if}

Are there any workarounds to this? I don't think I can get the behavior I want with this bug.

[furudean]

As an aside - setting a delay on the transition blocks updates too. Before the full rework it might be worth to look into if it's possible to allow state to update during a delay, as a separate PR.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.