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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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