]> git.r.bdr.sh - rbdr/forum/blob - src/animations/blink.js
ca213822ec82f856d056da08e0a618d999073598
[rbdr/forum] / src / animations / blink.js
1 import { sineOut } from 'svelte/easing';
2
3 export const blink = function blink(node, params) {
4
5 const originalWidth = parseFloat(getComputedStyle(node).width);
6 const originalHeight = parseFloat(getComputedStyle(node).height);
7
8 return {
9 delay: params.delay || 0,
10 duration: params.duration || 400,
11 easing: params.easing || sineOut,
12 css: (t, u) => {
13
14 const halfWidth = originalWidth / 2;
15 const halfHeight = originalHeight / 2;
16 const height = Math.round(t <= 0.2 ? (originalHeight * t) / 0.2 : originalHeight);
17 const marginY = Math.round(t <= 0.2 ? halfHeight * (1 - t / 0.2) : 0);
18 const width = Math.round(t > 0.2 ? ((t - 0.2) / 0.8) * originalWidth : 0);
19 const marginX = Math.round(t > 0.2 ? (1 - (t - 0.2) / 0.8) * halfWidth : halfWidth);
20
21 return `width: ${width}px; height: ${height}px; margin: ${marginY}px ${marginX}px`;
22 }
23 };
24 };