[rbdr/canvas] / src / lib / animations / blink.js

import { sineInOut } from 'svelte/easing';

export const blink = function blink(node, params) {
        const originalWidth = parseFloat(getComputedStyle(node).width);
        const originalHeight = parseFloat(getComputedStyle(node).height);

        return {
                delay: params.delay || 0,
                duration: params.duration || 400,
                easing: params.easing || sineInOut,
                css: (t) => {
                        const halfWidth = originalWidth / 2;
                        const halfHeight = originalHeight / 2;
                        const width = Math.round(t <= 0.2 ? (originalWidth * t) / 0.2 : originalWidth);
                        const marginY = Math.round(t <= 0.2 ? halfHeight * (1 - t / 0.2) : 0);
                        const height = Math.round(t > 0.2 ? ((t - 0.2) / 0.8) * originalHeight : 0);
                        const marginX = Math.round(t > 0.2 ? (1 - (t - 0.2) / 0.8) * halfWidth : halfWidth);

      console.log(width, height);

                        return `width: ${width}px; height: ${height}px;`;
                }
        };
};