* 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
---------
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
---------
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
---------
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
---------
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
---------
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
---------
Co-authored-by: Rich Harris <hello@rich-harris.dev>
* fix: avoid throwing `store_invalid_subscription_module` for runes
Co-authored-by: Paolo Ricciuti <ricciutipaolo@gmail.com>
* move test to the validator suite, which is faster
---------
Co-authored-by: Paolo Ricciuti <ricciutipaolo@gmail.com>
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* analyse exports before walking
* more
* another
* this is unused
* move stuff/tidy up
* this appears to be unnecessary
* this is all unnecessary
* simplify
* simplify
* simplify
* simplify
* move more stuff over
* changeset
* unused
* separate reassignment from mutation
* regenerate
* lint
* feat: add compiler error when encountering a $-prefixed store value outside a .svelte file
* add fromState/toState APIs
* another test, update types
* rename fromState to toStore, and toState to fromStore
* docs
* add docs
* separate client/server entry points for svelte/store
* fix: provide more hydration mismatch coverage
* tweak
* add test for safari borking stuff
* fix
* fix windows test
* failing test
* oops
* revert playground changes
* simplify
* template content hydration logic should really be separate from reset logic
* actually the test is incorrect, and now i cant seem to recreate what i saw before... hmm
* update comment to no longer mention templates
* failing test
* delete test for now
---------
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* speed up exclude_from_object
* changeset
* convert prop names to string at compile time
* faster still
---------
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* chore: add warning for derived self referencin
* update build
* address feedback
* address feedback
* build
* messages shouldn't end with a period
* simplify test
* regenerate
* newlines are free
* no need to export this, we can move it closer to where it's used
* fix double negative
---------
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* simplify
* fix/simplify
* fix/simplify
* start getting a grip of this mess
* tidy up
* more
* more
* more
* tidy up
* make things a bit less weird
* tweak
* more
* more
* add once once
* consolidate event handling code
* some progress. man, this stuff is entangled
* more
* tidy up
* simplify
* simplify
* more
* fix
* fix test names
* fix a bug
* tidy up
* changeset
* simplify
* regenerate
* tidy up
* tidy up
* tidy up
* simplify
* the module declaration case is already accounted for, above
* simplify/document
* typo
* "hoistable" is a misnomer
* hoist non_hoistable, rename
* more typos
* tweak
* regenerate
* fix: add css hash to custom element rendered with `svelte:element`
* simplify
* skip arg where possible
* drive-by improvements — remove some unnecessary arguments where possible
---------
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* feat: function called as tagged template literal is reactively called
Co-authored-by: Oscar Dominguez <dominguez.celada@gmail.com>
* chore: re-organize import of visitors
* simplify
---------
Co-authored-by: Oscar Dominguez <dominguez.celada@gmail.com>
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* start refactoring client transform visitor code
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* tweak
* painful
* more
* simplify
* more
* more
* more
* more
* more
* tidy up
* changeset
* fix: allow nested `<dt>`/`<dd>` elements if they are within a `<dl>` element
This introduces a resets array, which means descendants that are forbidden are allowed again, if an element within the resets array is encountered between the tag and the forbidden descendant
fixes#12676
* better name
* chore: perf tweaks for actions/styles/classes
- check if we really need to add/remove the class (calling `includes` first is cheaper than always setting/removing it)
- check if we really need to update a style (calling `getPropertyValue/setProperty` is expensive)
- check if we should call the action's update function (this is not only a perf tweak but also a correctness fix)
closes#12652
* changeset
---------
Co-authored-by: Rich Harris <rich.harris@vercel.com>
* start moving visitors into separate modules
* remove unused code
* more
* more
* tidy up
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* alphabetize
* more
* fix
* more
* more
* consolidate
* more
* more
* more
* more
* more
* more
* more
* tweak
* more
* more
* more
* more
* more
* more
* more
* more
* more
* more
* jfc what are we doing here
* more
* bizarre
* more
* more
* more
* more
* more
* more
* tidy
* one down
* dont merge
* hmm
* DRY
* more
* more
* tidy up
* tidy up
* add changeset, as this should have its own release
* tidy up
* oh i should probably hit save
* feat: make `<svelte:component>` unnecessary in runes mode
In Svelte 4, writing `<Component />` meant that the component instance is static. If you made the variable `Component` a reactive state variable and updated the component value, the component would not be reinstantiated with the new value - you had to use `<svelte:component>` for that. One reason was that having a dynamic component was more overhead, which is no longer the case in Svelte 5. We can therefore reduce the potential API surface area (by maybe deprecating `<svelte:component>` in the future) by allowing Svelte to recognize when a component variable is potentially dynamic. It turned out that this was already mostly the case. This PR fixes one case where it wasn't, and fixes another where this was wrongfully applied in legacy mode.
* we already have this function
* add interactive demos
* changeset
---------
Co-authored-by: Rich Harris <rich.harris@vercel.com>
language tools has to type its own shape for backwards compatibility, and it currently doesn't include the `$on` and `$set` methods, which means without widening the type as done here you would get a "this shape is not accepted" type error when passing it to `ComponentProps`
closes#12627
Closes#12643
Very weird behaviour from the draggable setter...if you set element.draggable="false" it will actually set draggable to true (the boolean).
* better code generation for slot props in SSR
* simplify
* remove getters mechanism from server compiler
* changeset
* no need to use getters in SSR mode
* fix comment
* add state.getters as alternative to binding.expression
* on second thoughts
* fix
* first of many
* couple more
* regenerate types
* more
* another
* more
* another
* another
* another
* remove binding.expression from client-side code
* tweak
* last one
* comment
* regenerate types
* add a changeset
* small tidy up
* simplify
* simplify
* simplify and fix
* simplify
github-actions[bot]
Dominic Gannaway
Ben McCann
Rich Harris
Simon H
Gautier Ben Aïm
Paolo Ricciuti
TOMIKAWA Sotaro
Frédéric Crozatier
Oscar Dominguez
Theodor Steiner
ottomated