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Maxwell #22

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3b6f5b3
basic carousel functionality finished
MaxSultan Jan 7, 2022
1820a1e
made mobile responsive
MaxSultan Jan 7, 2022
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31 changes: 31 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>React Carousel</title>
<link rel="stylesheet" href="styles/style.css" />
<link rel="prefetch" href="img/African_elephant.jpeg" as="image" />
<link rel="prefetch" href="img/bird.jpeg" as="image" />
<link rel="prefetch" href="img/chimps.jpeg" as="image" />
<link rel="prefetch" href="img/fox.jpeg" as="image" />
<link rel="prefetch" href="img/Northern_Baikal_Russia.jpeg" as="image" />
<link rel="prefetch" href="img/otter.jpeg" as="image" />
<link rel="prefetch" href="img/snail.jpeg" as="image" />
<link rel="prefetch" href="img/taranchula.jpeg" as="image" />
<script
src="https://unpkg.com/react@17/umd/react.development.js"
crossorigin
></script>
<script
src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"
crossorigin
></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
</head>
<body>
<div id="js-carousel" class="center-aligned"></div>
<script src="js/index.js"></script>
</body>
</html>
216 changes: 216 additions & 0 deletions js/index.js
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// How do I import json into an html file?

// function loadJSON(filelocation, callback) {
// var xobj = new XMLHttpRequest();
// xobj.overrideMimeType("application/json");
// xobj.open("GET", filelocation, true); // Replace 'my_data' with the path to your file
// xobj.onreadystatechange = function () {
// if (xobj.readyState == 4 && xobj.status == "200") {
// // Required use of an anonymous callback as .open will NOT return a value but simply returns undefined in asynchronous mode
// callback(xobj.responseText);
// }
// };
// xobj.send(null);
// }

// function init() {
// var location = "gallery.json";
// loadJSON((filelocation = location), function (response) {
// // Parse JSON string into object
// const loadedJSON = JSON.parse(response);
// console.log(loadedJSON);
// });
// }

// init();

// Never had to use the Fetch API because I typically use Axios.
// But I was about to replace the LoadJSON function with this
// fetch("gallery.json")
// .then((response) => response.text())
// .then((data) => console.log(JSON.parse(data)));

// I have never had to write anything but JSX in a react app.
// I have only ever used create-react-app... never my own toolchain

const e = React.createElement;

// class Carousel extends React.Component {
// constructor(props) {
// super(props);
// this.state = { liked: false };
// }

// render() {
// if (this.state.liked) {
// return "You liked this.";
// }

// return e(
// "button",
// { onClick: () => this.setState({ liked: true }) },
// "Like"
// );
// }
// }

function Carousel() {
const [data, setData] = React.useState([]);
const [displayedImageIndex, setDisplayedImageIndex] = React.useState(0);
// const [imageData, setImageData] = React.useState([]);

// using a ref here to trigger imperative animations
const imageRef = React.useRef(null);

React.useEffect(() => {
fetch("gallery.json")
.then((response) => response.text())
.then((data) => {
const carouselData = JSON.parse(data);
setData(carouselData);
// const container = [];
// I dont think I need to preload local assets
// this may be handled in the index.html
// carouselData.photos.forEach((image) => {
// preLoadImage(image.src)
// .then((res) => {
// container.push(res);
// // append the res... which is an image element to the page with a style of display:hidden
// // How do I append an image element to the return?
// })
// // TODO: remove console.log and handle error properly
// .catch((error) => console.log(error))
// .finally(() => {
// setImageData(container);
// });
// });
});
}, []);

const updateIndex = (index) => {
// if (imageRef && imageRef.current) {
// // add animation class here
// imageRef.current.className = "animate-left";
// console.log(imageRef.current);
// }
// setTimeout(() => {
if (index > 7) {
setDisplayedImageIndex(0);
} else if (index < 0) {
setDisplayedImageIndex(7);
} else {
setDisplayedImageIndex(index);
}
// }, 2000);
};

// const preLoadImage = (imageSource) => {
// return new Promise((resolve, reject) => {
// const img = new Image();

// img.onload = () => {
// resolve(img);
// };

// img.onerror = () => {
// reject(img);
// };

// img.src = imageSource;
// });
// };

return data?.photos?.length > 0
? e(
"div",
{ className: "carousel center-aligned" },
e("h4", { className: "title" }, data["gallery-title"]),
e("img", { src: data.photos[displayedImageIndex].src, ref: imageRef }),
e(
"div",
{ className: "button-container" },
e(
"button",
{ onClick: () => updateIndex(displayedImageIndex - 1) },
e("div", { className: "arrow-left" }, null)
),
e(
"button",
{ onClick: () => updateIndex(displayedImageIndex + 1) },
e("div", { className: "arrow-right" }, null)
)
),
e(
"div",
{ className: "dot-container" },
e(
"div",
{
className: `dot ${displayedImageIndex === 0 ? "active" : null}`,
onClick: () => updateIndex(0),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 1 ? "active" : null}`,
onClick: () => updateIndex(1),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 2 ? "active" : null}`,
onClick: () => updateIndex(2),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 3 ? "active" : null}`,
onClick: () => updateIndex(3),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 4 ? "active" : null}`,
onClick: () => updateIndex(4),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 5 ? "active" : null}`,
onClick: () => updateIndex(5),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 6 ? "active" : null}`,
onClick: () => updateIndex(6),
},
null
),
e(
"div",
{
className: `dot ${displayedImageIndex === 7 ? "active" : null}`,
onClick: () => updateIndex(7),
},
null
)
)
)
: "Data was not Loaded";
}

const domContainer = document.querySelector("#js-carousel");
ReactDOM.render(e(Carousel), domContainer);
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