Svelte 5: afterUpdate only tracks props that are being used in the template #9420
Description
Describe the bug
afterUpdate should run every time a component has been updated but currently it only runs if the prop that changes is actually been used in the template.
Reproduction
- go to this repl
- update count with the first button
- observe that the console logs "after update"
- update count2 with the second button
- observer that nothing shows up in the console
for reference this is svelte 4 behavior Svelte 4 REPL
Logs
No response
System Info
Svelte REPLSeverity
blocking an upgrade