From a7cf03c192470cbab13edeb1aec99e0c66dede10 Mon Sep 17 00:00:00 2001 From: Ruben Beltran del Rio Date: Sun, 1 May 2022 00:56:06 +0200 Subject: Update / use typescript --- src/lib/animations/blink.ts | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/lib/animations/blink.ts (limited to 'src/lib/animations/blink.ts') diff --git a/src/lib/animations/blink.ts b/src/lib/animations/blink.ts new file mode 100644 index 0000000..c291b06 --- /dev/null +++ b/src/lib/animations/blink.ts @@ -0,0 +1,25 @@ +import { sineOut } from 'svelte/easing'; +import type { AnimationConfig } from 'svelte/animate'; + +export const blink = function blink(node: HTMLElement, params: AnimationConfig): AnimationConfig{ + + const originalWidth = parseFloat(getComputedStyle(node).width); + const originalHeight = parseFloat(getComputedStyle(node).height); + + return { + delay: params.delay || 0, + duration: params.duration || 400, + easing: params.easing || sineOut, + css: (t: number): string => { + + const halfWidth = originalWidth / 2; + const halfHeight = originalHeight / 2; + const height = Math.round(t <= 0.2 ? (originalHeight * t) / 0.2 : originalHeight); + const marginY = Math.round(t <= 0.2 ? halfHeight * (1 - t / 0.2) : 0); + const width = Math.round(t > 0.2 ? ((t - 0.2) / 0.8) * originalWidth : 0); + const marginX = Math.round(t > 0.2 ? (1 - (t - 0.2) / 0.8) * halfWidth : halfWidth); + + return `width: ${width}px; height: ${height}px; margin: ${marginY}px ${marginX}px`; + } + }; +}; -- cgit