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curriculum/challenges/english/blocks/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md

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--description--

Now you have everything you want to include in the UI. The next step is to make the Load More Authors button fetch more authors whenever it's clicked. You can do this by adding a click event to the button and carefully incrementing the startingIndex and endingIndex variables.

Create a fetchMoreAuthors function with the arrow function syntax. Don't put anything in it yet. Make sure you use curly braces because you'll have more than one expression inside the function.

--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 use const to create a fetchMoreAuthors function.

js
assert.match(code, /const\s+fetchMoreAuthors\s*=\s*/)

fetchMoreAuthors should be a function.

js
assert.isFunction(fetchMoreAuthors)

Your fetchMoreAuthors function should not take any parameter.

js
assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)

Your fetchMoreAuthors function should use arrow syntax.

js
assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)

Your fetchMoreAuthors function should be empty.

js
assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\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}`);
  });

--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>
  `;
  });
};