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fix: ensure transitions properly cancel on completion #9778

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Merged
merged 1 commit into from
Dec 5, 2023
Merged

fix: ensure transitions properly cancel on completion #9778

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5 changes: 5 additions & 0 deletions .changeset/lazy-masks-sit.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'svelte': patch
---

fix: ensure transitions properly cancel on completion
9 changes: 6 additions & 3 deletions packages/svelte/src/internal/client/transitions.js
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Expand Up @@ -177,9 +177,12 @@ class TickAnimation {
}

cancel() {
const t = this.#reversed ? 1 : 0;
active_tick_animations.delete(this);
this.#tick_fn(t, 1 - t);
const current = this.#current / this.#duration;
if (current > 0 && current < 1) {
const t = this.#reversed ? 1 : 0;
this.#tick_fn(t, 1 - t);
}
}

finish() {
Expand Down Expand Up @@ -322,7 +325,7 @@ function create_transition(dom, init, direction, effect) {

animation.onfinish = () => {
const is_outro = curr_direction === 'out';
/** @type {Animation | TickAnimation} */ (animation).pause();
/** @type {Animation | TickAnimation} */ (animation).cancel();
if (is_outro) {
run_all(subs);
subs = [];
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8 changes: 5 additions & 3 deletions packages/svelte/tests/animation-helpers.js
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Expand Up @@ -102,16 +102,18 @@ class Animation {
}

finish() {
this.onfinish();
this.currentTime = this.#reversed ? 0 : this.#duration;
if (this.#reversed) {
raf.animations.delete(this);
}
this.onfinish();
}

cancel() {
this._applyKeyFrame(this.#reversed ? this.#keyframes.length - 1 : 0);
raf.animations.delete(this);
this.#paused = true;
if (this.currentTime > 0 && this.currentTime < this.#duration) {
this._applyKeyFrame(this.#reversed ? this.#keyframes.length - 1 : 0);
}
}

pause() {
Expand Down