oh hey i don't think we need this

packages/svelte/src/internal/client/dom/elements/transitions.js

@@ -116,174 +116,6 @@ function css_to_keyframe(css) {
 	return keyframe;
 }
 
-class TickAnimation {
-	/** @type {null | (() => void)} */
-	onfinish;
-
-	/** @type {(t: number, u: number) => string} */
-	#tick_fn;
-
-	/** @type {number} */
-	#duration;
-
-	/** @type {number} */
-	#current;
-
-	/** @type {number} */
-	#delay;
-
-	/** @type {number} */
-	#previous;
-
-	/** @type {boolean} */
-	paused;
-
-	/** @type {boolean} */
-	#reversed;
-
-	/** @type {number} */
-	#delay_current;
-
-	/** @type {boolean} */
-	#delayed_reverse;
-
-	/**
-	 * @param {(t: number, u: number) => string} tick_fn
-	 * @param {number} duration
-	 * @param {number} delay
-	 * @param {boolean} out
-	 */
-	constructor(tick_fn, duration, delay, out) {
-		this.#duration = duration;
-		this.#delay = delay;
-		this.paused = false;
-		this.#tick_fn = tick_fn;
-		this.#reversed = out;
-		this.#delay_current = delay;
-		this.#current = out ? duration : 0;
-		this.#previous = 0;
-		this.#delayed_reverse = false;
-		this.onfinish = null;
-		if (this.#delay) {
-			if (!out) {
-				this.#tick_fn(0, 1);
-			}
-		}
-	}
-
-	pause() {
-		this.paused = true;
-	}
-
-	play() {
-		this.paused = false;
-		if (!active_tick_animations.has(this)) {
-			this.#previous = raf.now();
-			if (active_tick_ref === undefined) {
-				active_tick_ref = raf.tick(handle_raf);
-			}
-			active_tick_animations.add(this);
-		}
-	}
-
-	#reverse() {
-		this.#reversed = !this.#reversed;
-		if (this.paused) {
-			if (this.#current === 0) {
-				this.#current = this.#duration;
-			}
-			this.play();
-		}
-	}
-
-	reverse() {
-		if (this.#delay === 0) {
-			this.#reverse();
-		} else {
-			this.#delay_current = this.#delay;
-			this.#delayed_reverse = true;
-		}
-	}
-
-	cancel() {
-		active_tick_animations.delete(this);
-		const current = this.#current / this.#duration;
-		if (current > 0 && current < 1) {
-			const t = this.#reversed ? 1 : 0;
-			this.#tick_fn(t, 1 - t);
-		}
-	}
-
-	finish() {
-		active_tick_animations.delete(this);
-		if (this.onfinish) {
-			this.onfinish();
-		}
-	}
-
-	/** @param {number} time */
-	_update(time) {
-		let diff = time - this.#previous;
-		this.#previous = time;
-		if (this.#delay_current !== 0) {
-			const is_delayed = this.#delay_current === DELAY_NEXT_TICK;
-			let cancel = !this.#delayed_reverse;
-			this.#delay_current -= diff;
-			if (this.#delay_current < 0 || is_delayed || (this.#delay_current === 0 && this.#reversed)) {
-				const delay_diff = is_delayed ? 0 : -this.#delay_current;
-				this.#delay_current = 0;
-
-				if (this.#delayed_reverse) {
-					this.#delayed_reverse = false;
-					this.#reverse();
-				} else if (delay_diff !== 0 || this.#reversed) {
-					diff = delay_diff;
-				}
-				cancel = false;
-			} else if (this.#delay_current === 0) {
-				this.#delay_current = DELAY_NEXT_TICK;
-			}
-			if (cancel) {
-				return;
-			}
-		}
-		this.#current += this.#reversed ? -diff : diff;
-		let t = this.#current / this.#duration;
-
-		if (t < 0) {
-			t = 0;
-		} else if (t > 1) {
-			t = 1;
-		}
-
-		if ((this.#reversed && t <= 0) || (!this.#reversed && t >= 1)) {
-			t = this.#reversed ? 0 : 1;
-			if (this.#delay_current === 0) {
-				active_tick_animations.delete(this);
-				if (this.onfinish) {
-					this.paused = true;
-					this.onfinish();
-				}
-			}
-		}
-		this.#tick_fn(t, 1 - t);
-	}
-}
-
-/** @param {number} time */
-function handle_raf(time) {
-	for (const animation of active_tick_animations) {
-		if (!animation.paused) {
-			animation._update(time);
-		}
-	}
-	if (active_tick_animations.size !== 0) {
-		active_tick_ref = raf.tick(handle_raf);
-	} else {
-		active_tick_ref = undefined;
-	}
-}
-
 /** @param {number} t */
 const linear = (t) => t;