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In #10503 I removed the
store_sub_exist
mechanism for omitting store subscriptions for directive names, because it's not a great use of our complexity budget to optimise such a niche case while leaving more common uses (event handlers, effects, etc) unoptimised.This PR proposes a more universal approach — instead of trying to do the static analysis ourselves, we leave it to tools like Rollup. With this PR, a component like this...
...gets turned into this...
...which Rollup turns into this (not sure why it can't treeshake
writable()
away, but that's a separate issue):The trade-off is that in the (perhaps more common?) case that a store value contributes to SSR, each
store_get
reference gets a??= {}
added, and theunsubscribe_stores(...)
call now sits inside aif ($$store_subs)
block.Before submitting the PR, please make sure you do the following
feat:
,fix:
,chore:
, ordocs:
.Tests and linting
pnpm test
and lint the project withpnpm lint