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fix: apply transition_in/out to svelte:element with local transition #8865

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Jun 28, 2023
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fix: apply transition_in/out to svelte:element with local transition #8865

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12c9676
fix #8233 svelte:element local transition not applied
Jun 28, 2023
836f233
Update .changeset/neat-feet-accept.md
dummdidumm Jun 28, 2023
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5 changes: 5 additions & 0 deletions .changeset/neat-feet-accept.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'svelte': patch
---

fix: apply transition_in/out to svelte:element with local transition
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16 changes: 12 additions & 4 deletions packages/svelte/src/compiler/compile/render_dom/wrappers/Element/index.js
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Expand Up @@ -233,6 +233,14 @@ export default class ElementWrapper extends Wrapper {
strip_whitespace,
next_sibling
);

// in the case of `parent_block -> child_dynamic_element_block -> child_dynamic_element`
// `child_dynamic_element_block.add_intro/outro` is called inside `new ElementWrapper()`
// but when `is_local === true` it does not bubble to parent_block
// we manually add transitions back to the parent_block (#8233)
if (node.intro) block.add_intro(node.intro.is_local);
if (node.outro) block.add_outro(node.outro.is_local);

// the original svelte:element is never used for rendering, because
// it gets assigned a child_dynamic_element which is used in all rendering logic.
// so doing all of this on the original svelte:element will just cause double
Expand Down Expand Up @@ -266,10 +274,10 @@ export default class ElementWrapper extends Wrapper {
this.event_handlers = this.node.handlers.map(
(event_handler) => new EventHandler(event_handler, this)
);
if (node.intro || node.outro) {
if (node.intro) block.add_intro(node.intro.is_local);
if (node.outro) block.add_outro(node.outro.is_local);
}

if (node.intro) block.add_intro(node.intro.is_local);
if (node.outro) block.add_outro(node.outro.is_local);

if (node.animation) {
block.add_animation();
}
Expand Down