From bce557cc2dc767628bed6aac87301a1be7c5431b Mon Sep 17 00:00:00 2001
From: rxliuli <rxliuli@gmail.com>
Date: Tue, 4 Nov 2025 05:03:50 +0800
Subject: init commit

---
 src/utils/transition.ts | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/utils/transition.ts

(limited to 'src/utils/transition.ts')

diff --git a/src/utils/transition.ts b/src/utils/transition.ts
new file mode 100644
index 0000000..e89b038
--- /dev/null
+++ b/src/utils/transition.ts
@@ -0,0 +1,45 @@
+import { cubicOut } from 'svelte/easing';
+import type { EasingFunction, TransitionConfig } from 'svelte/transition';
+
+interface FlyAndBlurParams {
+    // Time (ms) before the animation starts.
+    delay?: number;
+    // Total animation time (ms).
+    duration?: number;
+    // Easing function (defaults to cubicOut).
+    easing?: EasingFunction;
+    // Horizontal offset in pixels at start (like `fly`).
+    x?: number;
+    // Vertical offset in pixels at start (like `fly`).
+    y?: number;
+    // Initial blur radius in pixels.
+    blur?: number;
+}
+
+export function flyAndBlur(
+    node: Element,
+    {
+        delay = 0,
+        duration = 420,
+        easing = cubicOut,
+        x = 0,
+        y = 0,
+        blur = 3,
+    }: FlyAndBlurParams = {},
+): TransitionConfig {
+    const style = getComputedStyle(node);
+    const initialOpacity = +style.opacity;
+
+    return {
+        delay,
+        duration,
+        easing,
+        css: (t: number, u: number) => {
+            return `
+                    transform: translate(${x * u}px, ${y * u}px);
+                    opacity: ${initialOpacity * t};
+                    filter: blur(${blur * u}px);
+                `;
+        },
+    };
+}
-- 
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