function _extends() {_extends = Object.assign || function (target) {for (var i = 1; i < arguments.length; i++) {var source = arguments[i];for (var key in source) {if (Object.prototype.hasOwnProperty.call(source, key)) {target[key] = source[key];}}}return target;};return _extends.apply(this, arguments);}console.clear();

import React, {
useState,
useEffect,
useLayoutEffect,
useRef } from
"https://cdn.skypack.dev/react";
import ReactDOM from "https://cdn.skypack.dev/react-dom";

const slides = [
{
  image:
  "https://images.unsplash.com/photo-1614983646436-b3d7a8398b3f?crop=entropy&cs=tinysrgb&fit=crop&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTYxNTU4MTkxNA&ixlib=rb-1.2.1&q=80&w=400&h=600",
  title: "Animation" },

{
  image:
  "https://images.unsplash.com/photo-1615421559287-5e6eecec3b80?crop=entropy&cs=tinysrgb&fit=crop&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTYxNTU4MjAwOQ&ixlib=rb-1.2.1&q=80&w=400&h=600",
  title: "CSS" },

{
  image:
  "https://images.unsplash.com/photo-1615098270177-e2db45986811?crop=entropy&cs=tinysrgb&fit=crop&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTYxNTU4MjAwOQ&ixlib=rb-1.2.1&q=80&w=400&h=600",
  title: "HTML" },

{
  image:
  "https://images.unsplash.com/photo-1615114814213-a245ffc79e9a?crop=entropy&cs=tinysrgb&fit=crop&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTYxNTU4MjAwOQ&ixlib=rb-1.2.1&q=80&w=400&h=600",
  title: "React" }];



function getRect(el) {
  return el.getBoundingClientRect();
}

function flip(firstRect, el) {
  requestAnimationFrame(() => {
    const lastEl = el;
    const lastRect = getRect(lastEl);
    const dx = lastRect.x - firstRect.x;
    const dy = lastRect.y - firstRect.y;
    const dw = lastRect.width / firstRect.width;
    const dh = lastRect.height / firstRect.height;
    lastEl.dataset.flipping = true;
    lastEl.style.setProperty("--dx", dx);
    lastEl.style.setProperty("--dy", dy);
    lastEl.style.setProperty("--dw", dw);
    lastEl.style.setProperty("--dh", dh);
    requestAnimationFrame(() => delete lastEl.dataset.flipping);
  });
}

function useFlip(ref) {
  const rectRef = useRef(null);
  useLayoutEffect(() => {
    if (ref.current) {
      if (!rectRef.current) {
        rectRef.current = getRect(ref.current);
      }
      flip(rectRef.current, ref.current);
      rectRef.current = getRect(ref.current);
    }
  });
}

function useKeyDown(onKeyDown) {
  useEffect(() => {
    document.addEventListener("keydown", onKeyDown);

    return () => {
      document.removeEventListener("keydown", onKeyDown);
    };
  }, []);
}

/* ---------------------------------- */

function ImageTitle(props) {
  const ref = useRef(null);
  useFlip(ref);

  return /*#__PURE__*/React.createElement("span", _extends({}, props, { ref: ref, "data-flip": true, className: "title" }));
}

function Image({ src, title, selected, ...props }) {
  const ref = useRef(null);
  useFlip(ref);

  return /*#__PURE__*/(
    React.createElement("div", _extends({},
    props, {
      className: "image",
      key: src,
      "data-selected": selected || undefined }), /*#__PURE__*/

    React.createElement("img", { "data-flip": true, src: src, ref: ref }), /*#__PURE__*/
    React.createElement(ImageTitle, null, /*#__PURE__*/
    React.createElement("strong", null, title), " 2021")));



}

function App() {
  const [selected, setSelected] = useState(0);

  useKeyDown(event => {
    switch (event.key) {
      case "ArrowRight":
        setSelected(selected => (selected + 1) % slides.length);
        break;
      case "ArrowLeft":
        setSelected(
        selected => (slides.length + (selected - 1)) % slides.length);

        break;
      default:
        break;}

  });

  return /*#__PURE__*/(
    React.createElement("div", { className: "app" }, /*#__PURE__*/
    React.createElement("h1", null, "@keyframers"), /*#__PURE__*/
    React.createElement("div", { className: "gallery" },
    slides.map((slide, index) => {
      return /*#__PURE__*/(
        React.createElement(Image, {
          src: slide.image,
          title: slide.title,
          selected: index === selected,
          key: index,
          onClick: () => setSelected(index) }));


    }))));



}

ReactDOM.render( /*#__PURE__*/React.createElement(App, null), document.querySelector("#app"));