ContextQMD
Back to Freecodecamp

Step 24

curriculum/challenges/english/blocks/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md

latest4.1 KB
Original Source

--description--

Your fCC Authors Page is now complete. But you could improve on a few things.

First, if you click the Load More Authors button a couple of times, you'll see that it won't add more authors to the page. That's because you've reached the end of the authors list. For a better user experience, you should make it clear when there's no more data to display by disabling the button and changing its text. An if statement is the perfect tool for this.

Inside the fetchMoreAuthors function, write an if statement and set the condition to authorDataArr.length <= endingIndex – meaning there's no more data to load.

--before-all--

js
window.fetch = () => Promise.resolve({json: () => Promise.resolve([{ author: 'Whoever', image: 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==', url: "http://not-a-real-url.nowhere/", bio: 'words go here' }])});

--hints--

You should have an if statement.

js
assert.match(code, /if\s*\(/)

Your if statement should take in authorDataArr.length <= endingIndex as its condition.

js
assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)

Your if statement should be empty.

js
assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)

--seed--

--seed-contents--

html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>freeCodeCamp News Author Page</title>
    <link rel="stylesheet" href="./styles.css" />
  </head>
  <body>
    <h1 class="title">freeCodeCamp News Author Page</h1>

    <main>
      <div id="author-container"></div>
      <button class="btn" id="load-more-btn">Load More Authors</button>
    </main>

    <script src="./script.js"></script>
  </body>
</html>
css
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --main-bg-color: #1b1b32;
  --light-grey: #f5f6f7;
  --dark-purple: #5a01a7;
  --golden-yellow: #feac32;
}

body {
  background-color: var(--main-bg-color);
  text-align: center;
}

.title {
  color: var(--light-grey);
  margin: 20px 0;
}

#author-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.user-card {
  border-radius: 15px;
  width: 300px;
  height: 350px;
  background-color: var(--light-grey);
  margin: 20px;
}

.user-img {
  width: 150px;
  height: 150px;
  object-fit: cover;
}

.purple-divider {
  background-color: var(--dark-purple);
  width: 100%;
  height: 15px;
}

.author-name {
  margin: 10px;
}

.bio {
  margin: 20px;
}

.error-msg {
  color: var(--light-grey);
}

.btn {
  cursor: pointer;
  width: 200px;
  margin: 10px;
  color: var(--main-bg-color);
  font-size: 14px;
  background-color: var(--golden-yellow);
  background-image: linear-gradient(#fecc4c, #ffac33);
  border-color: var(--golden-yellow);
  border-width: 3px;
}
js
const authorContainer = document.getElementById('author-container');
const loadMoreBtn = document.getElementById('load-more-btn');

let startingIndex = 0;
let endingIndex = 8;
let authorDataArr = [];

fetch('https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json')
  .then((res) => res.json())
  .then((data) => {
    authorDataArr = data;
    displayAuthors(authorDataArr.slice(startingIndex, endingIndex));  
  })
  .catch((err) => {
    console.error(`There was an error: ${err}`);
  });

const fetchMoreAuthors = () => {
  startingIndex += 8;
  endingIndex += 8;

  displayAuthors(authorDataArr.slice(startingIndex, endingIndex));
  --fcc-editable-region--

  --fcc-editable-region--
};

const displayAuthors = (authors) => {
  authors.forEach(({ author, image, url, bio }, index) => {
    authorContainer.innerHTML += `
    <div id="${index}" class="user-card">
      <h2 class="author-name">${author}</h2>
      
      <p class="bio">${bio}</p>
      <a class="author-link" href="${url}" target="_blank">${author}'s author page</a>
    </div>
  `;
  });
};

loadMoreBtn.addEventListener('click', fetchMoreAuthors);