Use fade animation

src/lib/animation/index.ts

@@ -1,4 +1,3 @@
-import type { EasingFunction, TransitionConfig } from "svelte/transition";
 import type { AnimationConfig, FlipParams } from "svelte/animate";
 import { cubicOut } from "svelte/easing";
 
@@ -7,129 +6,24 @@ export const transition =
 
 export const duration = 500;
 
-const remap = (
-	value: number,
-	low1: number,
-	high1: number,
-	low2: number,
-	high2: number,
-) => low2 + ((high2 - low2) * (value - low1)) / (high1 - low1);
+interface FadeOptions {
+    delay?: number;
+    duration?: number;
+    easing?: (t: number) => number;
+    type?: "in" | "out";
+}
 
-const choose = (
-	direction: "in" | "out" | "both",
-	defaultValue: number,
-	inValue?: number,
-	outValue?: number,
-) =>
-	direction !== "out"
-		? typeof inValue === "number"
-			? inValue
-			: defaultValue
-		: typeof outValue === "number"
-			? outValue
-			: defaultValue;
-
-type Combination<T extends string, U extends string> = `${T} ${U}`;
-
-export const blur = (
-	_: HTMLElement,
-	config:
-		| Partial<{
-				blurMultiplier: number;
-				duration: number;
-				easing: EasingFunction;
-				scale: {
-					start: number;
-					end: number;
-				};
-				x: {
-					start: number;
-					end: number;
-				};
-				y: {
-					start: number;
-					end: number;
-				};
-				delay: number;
-				opacity: boolean;
-				origin: Combination<
-					"top" | "bottom" | "left" | "right" | "center",
-					"top" | "bottom" | "left" | "right" | "center"
-				> & {};
-		  }>
-		| undefined,
-	dir: {
-		direction: "in" | "out" | "both";
-	},
-): TransitionConfig => {
-	const prefersReducedMotion = window.matchMedia(
-		"(prefers-reduced-motion: reduce)",
-	).matches;
-	if (typeof config?.opacity === "undefined" && config) config.opacity = true;
-	const isUsingTranslate = !!config?.x || !!config?.y || !!config?.scale;
-	return {
-		delay: config?.delay || 0,
-		duration: prefersReducedMotion ? 0 : config?.duration || 300,
-		css: (t) => {
-			if (prefersReducedMotion) return "";
-			const translate = isUsingTranslate
-				? `translate(${remap(
-						t,
-						0,
-						1,
-						choose(
-							dir.direction,
-							0,
-							config?.x?.start,
-							config?.x?.end,
-						),
-						choose(
-							dir.direction,
-							0,
-							config?.x?.end,
-							config?.x?.start,
-						),
-					)}px, ${remap(
-						t,
-						0,
-						1,
-						choose(
-							dir.direction,
-							0,
-							config?.y?.start,
-							config?.y?.end,
-						),
-						choose(
-							dir.direction,
-							0,
-							config?.y?.end,
-							config?.y?.start,
-						),
-					)}px) scale(${remap(
-						t,
-						0,
-						1,
-						choose(
-							dir.direction,
-							0.9,
-							config?.scale?.start,
-							config?.scale?.end,
-						),
-						choose(
-							dir.direction,
-							1,
-							config?.scale?.end,
-							config?.scale?.start,
-						),
-					)})`
-				: ``;
-			return `filter: blur(${(1 - t) * (config?.blurMultiplier || 1)}px); opacity: ${config?.opacity ? t : 1}; transform: ${
-				translate
-			}; ${config?.origin ? `transform-origin: ${config.origin};` : ""}`;
-		},
-		easing: config?.easing,
-	};
-};
+export function fade(
+    node: HTMLElement,
+    { delay = 0, duration = 400, easing = cubicOut, type = "in" }: FadeOptions = {}
+): AnimationConfig {
+    return {
+        delay,
+        duration,
+        easing,
+        css: (t) => `opacity: ${type === "in" ? t : 1 - t};`,
+    };
+}
 
 // eslint-disable-next-line @typescript-eslint/no-unsafe-function-type
 export function is_function(thing: unknown): thing is Function {
@@ -165,7 +59,7 @@ export function flip(
 			? duration(Math.sqrt(dx * dx + dy * dy))
 			: duration,
 		easing,
-		css: (t, u) => {
+		css: (_t, u) => {
 			const x = u * dx;
 			const y = u * dy;
 			// const sx = scale ? t + (u * from.width) / to.width : 1;

src/lib/components/functional/Dropdown.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { blur, duration, transition } from "$lib/animation";
+	import { duration, fade, transition } from "$lib/animation";
 	import { ChevronDown } from "lucide-svelte";
 	import { onMount } from "svelte";
 	import { quintOut } from "svelte/easing";
@@ -60,31 +60,13 @@
 		<div class="grid grid-cols-1 grid-rows-1 w-fit text-left flex-grow-0">
 			{#key selected}
 				<p
-					in:blur={{
+					in:fade={{
 						duration,
 						easing: quintOut,
-						blurMultiplier: 6,
-						scale: {
-							start: 0.9,
-							end: 1,
-						},
-						y: {
-							start: isUp ? -50 : 50,
-							end: 0,
-						},
 					}}
-					out:blur={{
+					out:fade={{
 						duration,
 						easing: quintOut,
-						blurMultiplier: 6,
-						scale: {
-							start: 1,
-							end: 0.9,
-						},
-						y: {
-							start: 0,
-							end: isUp ? 50 : -50,
-						},
 					}}
 					class="col-start-1 row-start-1 text-left"
 				>
@@ -108,20 +90,10 @@
 	</button>
 	{#if open}
 		<div
-			style={hover ? "will-change: opacity, blur, transform" : ""}
-			transition:blur={{
+			style={hover ? "will-change: opacity, fade, transform" : ""}
+			transition:fade={{
 				duration,
 				easing: quintOut,
-				blurMultiplier: 6,
-				scale: {
-					start: 0.9,
-					end: 1,
-				},
-				y: {
-					start: -10,
-					end: 0,
-				},
-				origin: "top center",
 			}}
 			class="w-full shadow-xl bg-panel-alt shadow-black/25 absolute overflow-hidden top-full mt-1 left-0 z-50 bg-background rounded-xl"
 		>

src/lib/components/functional/Navbar.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 	import { browser } from "$app/environment";
 	import { page } from "$app/stores";
-	import { blur, duration } from "$lib/animation";
+	import { duration, fade } from "$lib/animation";
 	import { theme } from "$lib/store/index.svelte";
 	import clsx from "clsx";
 	import { MoonIcon, SunIcon } from "lucide-svelte";
@@ -53,23 +53,13 @@
 			{#key item.name}
 				<div
 					class="w-full row-start-1 col-start-1 h-full flex items-center justify-center gap-3"
-					in:blur={{
-						blurMultiplier: 6,
+					in:fade={{
 						duration,
 						easing: quintOut,
-						y: {
-							start: -48,
-							end: 0,
-						},
 					}}
-					out:blur={{
-						blurMultiplier: 6,
+					out:fade={{
 						duration,
 						easing: quintOut,
-						y: {
-							start: 0,
-							end: 48,
-						},
 					}}
 				>
 					<div class="relative">
@@ -78,44 +68,21 @@
 							<div
 								class="absolute overflow-hidden grid grid-rows-1 grid-cols-1 -top-1 font-display -right-1 w-fit px-1.5 h-4 rounded-full bg-badge text-on-badge font-medium"
 								style="font-size: 0.7rem;"
-								transition:blur={{
-									blurMultiplier: 4,
+								transition:fade={{
 									duration,
 									easing: quintOut,
-									scale: {
-										start: 0.5,
-										end: 1,
-									},
 								}}
 							>
 								{#key item.badge}
 									<div
 										class="flex items-center justify-center w-full h-full col-start-1 row-start-1"
-										in:blur={{
+										in:fade={{
 											duration,
 											easing: quintOut,
-											blurMultiplier: 3,
-											y: {
-												start: -12,
-												end: 0,
-											},
-											scale: {
-												start: 0.75,
-												end: 1,
-											},
 										}}
-										out:blur={{
+										out:fade={{
 											duration,
 											easing: quintOut,
-											blurMultiplier: 3,
-											y: {
-												start: 0,
-												end: 12,
-											},
-											scale: {
-												start: 1,
-												end: 0.75,
-											},
 										}}
 									>
 										{item.badge}

src/routes/+layout.svelte

@@ -2,7 +2,7 @@
 	import { beforeNavigate, goto } from "$app/navigation";
 	import { page } from "$app/stores";
 	import { PUB_HOSTNAME, PUB_PLAUSIBLE_URL } from "$env/static/public";
-	import { blur, duration } from "$lib/animation";
+	import { duration, fade } from "$lib/animation";
 	import featuredImage from "$lib/assets/VERT_Feature.webp";
 	import ConversionPanel from "$lib/components/functional/ConversionPanel.svelte";
 	import Navbar from "$lib/components/functional/Navbar.svelte";
@@ -136,32 +136,14 @@
 				.find((i) => i.url === "/convert")
 				?.activeMatch($page.url.pathname)}
 				<div
-					in:blur={{
-						blurMultiplier: 8,
+					in:fade={{
 						duration: duration + 50,
 						delay: 50,
 						easing: quintOut,
-						y: {
-							start: -24,
-							end: 0,
-						},
-						scale: {
-							start: 0.95,
-							end: 1,
-						},
 					}}
-					out:blur={{
-						blurMultiplier: 8,
+					out:fade={{
 						duration,
 						easing: quintOut,
-						y: {
-							start: 0,
-							end: 24,
-						},
-						scale: {
-							start: 1,
-							end: 1.05,
-						},
 					}}
 				>
 					<ConversionPanel />
@@ -174,33 +156,13 @@
 		{#key data.pathname}
 			<div
 				class="row-start-1 col-start-1"
-				in:blur={{
-					blurMultiplier: 8,
+				in:fade={{
 					duration,
 					easing: quintOut,
-					x: {
-						start: goingLeft ? -100 : 100,
-						end: 0,
-					},
-					y: {
-						start: 72,
-						end: 0,
-					},
-					origin: "top center",
 				}}
-				out:blur={{
-					blurMultiplier: 8,
+				out:fade={{
 					duration,
 					easing: quintOut,
-					x: {
-						start: 0,
-						end: goingLeft ? 100 : -100,
-					},
-					y: {
-						start: 0,
-						end: 72,
-					},
-					origin: "top center",
 				}}
 			>
 				<div class="flex flex-col h-full">

src/routes/convert/+page.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { blur, duration } from "$lib/animation";
+	import { duration, fade } from "$lib/animation";
 	import ConversionPanel from "$lib/components/functional/ConversionPanel.svelte";
 	import Dropdown from "$lib/components/functional/Dropdown.svelte";
 	import Uploader from "$lib/components/functional/Uploader.svelte";
@@ -121,14 +121,9 @@
 	{#if files.files.length === 1}
 		<div
 			class="w-full relative"
-			transition:blur={{
-				blurMultiplier: 24,
+			transition:fade={{
 				duration,
 				easing: quintOut,
-				scale: {
-					start: 1.02,
-					end: 1,
-				},
 			}}
 		>
 			<img