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 width = Math.round(t <= 0.2 ? (originalWidth * t) / 0.2 : originalWidth);
			const height = Math.round(t > 0.2 ? ((t - 0.2) / 0.8) * originalHeight : 0);

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