Fixes#13187. This ensures that we update the local fallback value in the case where the fallback is used so that we persist local changes to bindable props. Otherwise, any incoming changes from the outside will reset the incoming value back to the old fallback value.
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Co-authored-by: Simon Holthausen <simon.holthausen@vercel.com>
Fixes#13146.
Sync effects are not possible with Svelte 5's push-pull system because they can make can break the reactive graph – which is also why we don't permit writes within a derived too. The same problem is occurring here, as inspect effects are run sync – they are actually happening as part of an existing derived – which means they're a bit like writes in a derived and can cause tearing to the reactive signal graph. To avoid this we can call flushSync just before invoking these effects, as that should ensure the graph is made consistent again.
Also another issue I found was that we don't "reset" the inspect_effects Set when we enter a derived – which we should as a derived can create it's own local state that should have no bearing on the parent inspect effect.
Add a new visitor to the "strip TS AST" logic. Strictly speaking this results in incorrect ASTs but esrap, our printer, just ignores them at those positions, so we can do that.
An alternative would be to adjust zimmerframe to be able to return something to say "delete this node"
Fixes#13173
In case of something like `foo = bar.map(...)`, foo would have ownership
of the array itself, while the individual items would have ownership
of the component that created the proxy. That means if we later do
`foo[0].baz = 42`, we could get a false-positive ownership violation,
since the two proxies are not connected to each other via the parent
relationship. For this reason, we need to widen the ownership of the
children upon access when we detect they are not connected.
Fixes#13137
Fixes#13174. Turns out that we we skipping this important work because we return true early – thus not connecting the unowned derived back to the reaction.
We have a `run_scripts` function which is invoked in case a template block contains a script tag, and that function replaces the script tags (so that they actually run). If such a script tag is first or last in the template, the replacement is not picked up by our `node.first_node/last_node` logic anymore, and so it contains a stale tag. That means on cleanup the remove logic fails. In the case of the referenced issue, it just runs past the script tag till the very end of the head, removing the just added style tag from the new page.
Fixes#13086
As a byproduct of #12239 some types were changed from being directly exported to indirectly exported. TypeScript is bad at following these types while generating d.ts files, so we can't do that. A check at the end of the types generation was added to prevent regressions in the future. Fixes#13128
Also removes the old types from `svelte/reactivity` which are deprecated for a while now.
part of #11502 - to close it completely, we also need to look at using and possibly implement heuristics within bundler plugins to give more details
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Co-authored-by: Simon Holthausen <simon.holthausen@vercel.com>
Uses new dts-buddy capabilities and the corresponding tsconfig option to strip away types/properties (and their dependencies) that are marked with `@internal`
Also hides the legacy AST types from the output
To not clutter the exports, the AST types are moved into a namespace named AST
closes#12292
* fix: ensure signal status is set in legacy mode
fixes#13051
* add (failing) test
* alternative fix
* add changeset
* alternative fix
* add comment
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Co-authored-by: Rich Harris <rich.harris@vercel.com>
Co-authored-by: Dominic Gannaway <dg@domgan.com>
* simplify some parser logic, improve some compiler errors
* move logic into visitors
* more
* turns out we're doing a bunch of unnecessary work on closing tags
* tidy up
* changeset
* lint
This makes it possible to slow them down using dev tools, and overall ties the implementation more closely to WAAPI, which is good. Also fixes#12730 (all four cases, css, tick, css+tick, neither are now supported) and fixes#13019 (passed empty fallback object)
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Co-authored-by: Matei Trandafir <matei_trand@yahoo.com>
Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
* fix: repair `href` attribute mismatches
The reasoning in #9662 turns out to be false: While it's true that the href would resolve to the same URL on the initial page, once you're doing a client-side navigation to a URL at a different depth, the relative path would now point to the wrong location. Therefore we need to repair href hydration mismatches
fixes https://github.com/sveltejs/kit/issues/12254
* remove test
* Revert "remove test"
This reverts commit fa43304329.
* fix test
* remove comment, since the rationale for skipping the attributes in question is covered by the one immediately below
* fix
* add test for <a> specifically
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Co-authored-by: Rich Harris <rich.harris@vercel.com>
* feat: allow non-synchronous legacy component instantiation
Add a new option to the legacy class component interface so that `flush_sync` can be omitted. Part of https://github.com/sveltejs/kit/issues/12248
* lint
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Co-authored-by: Rich Harris <rich.harris@vercel.com>
* fix: ensure $inspect works with SvelteMap and SvelteSet
* build
* dev only
* dev only
* lint
* lint
* lint
* alternative
* Update packages/svelte/src/reactivity/map.js
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Co-authored-by: Rich Harris <rich.harris@vercel.com>
* fix: more robust handling of var declarations
- fixes#12807: state declared with var is now retrieved using a new `safe_get` function, which works like `get` but checks for undefined
- fixes#12900: ensure we're not creating another new scope for block statements of function declarations, which resulted in var declarations getting "swallowed" (because they were hoisted to the function declaration scope and never seen by our logic)
* simplify
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Co-authored-by: Rich Harris <rich.harris@vercel.com>
The backing store variable of a $store read could be a variable that itself needs a transformer, which is why we need to make accessing the reads lazy
fixes#12859
* breaking: deprecate `context="module"` in favor of `module`
Also reserve a few attributes, which we may or may not use in the future
closes#12637
* fix tests
* one more
* add svelte package to the root so eslint and prettier can use it
* tweak messages
* warn on unknown attributes
* regenerate
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Co-authored-by: Rich Harris <rich.harris@vercel.com>
* feat: adds $state.link rune
* add tests
* types
* docs
* debugger
* lint
* Update .changeset/friendly-rice-confess.md
Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
* Update packages/svelte/src/compiler/phases/2-analyze/index.js
Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
* feedback
* feedback
* feedback
* feedback
* rename link_state to linked_state for grammatical consistency
* oops, victim of find-replace
* no need to store linked_value if setting
* simplify tests
* test behaviour of objects
* update docs
* copy
* more direct example that shows unlinking and relinking
* add callback argument support
* fix
* tidy up
* document callback
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Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
Co-authored-by: Rich Harris <rich.harris@vercel.com>
We need to allow mixing those within custom element components because in a future version of Svelte where we remove the Svelte-version of slots, we'll preserve slots as-is, and people should use those within their components. At the same time they should be able to make use of snippets for reusable blocks of code.
Also document that you should continue using slots within custom elements.
closes#12892
* feat: treat tag with `[` as a component, even if lowercase
* chore: simpler regex
Co-authored-by: Conduitry <git@chor.date>
* feat: error on invalid component name
* fix: fully revert dot notation test
* tweak error message
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Co-authored-by: Conduitry <git@chor.date>
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* step one
* WIP
* more
* fix
* collapse sequential sibling calls
* working
* working but messy
* tidy up
* unused
* tweak
* tweak
* tidy
* tweak
* tweak
* revert
* changeset
* Update packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/fragment.js
Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
* revert this bit
* align
* comments
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Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>
* chore: use closures for state proxies
* use variables
* early return
* tidy up
* move ownership stuff into separate object
* put original value directly on STATE_SYMBOL
* rename
* tidy up
* tidy
* tweak
* fix
* remove is_frozen check
* remove `$state.is`
* avoid mutations
* tweak
* changesets
* changeset
* changeset
* regenerate
* add comment
* add note
* add test
* fix: improve createRawSnippet types
Add cleanup type to return value of setup function
* changeset
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Co-authored-by: Rich Harris <hello@rich-harris.dev>
Frédéric Crozatier
Dominic Gannaway
Paolo Ricciuti
Simon H
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