fetch

Fetch API – Local text, json, external API – with Arrow Functions

Get Local Text File Data

function getText() {
  fetch('test.txt')
    .then(res => res.text())
    .then(data => {
      console.log(data);
      document.getElementById('output').innerHTML = data;
    })
    .catch(err => console.log(err));
}

Get Local JSON Data

function getJson() {
  fetch('posts.json')
    .then(res => res.json())
    .then(data => {
      console.log(data);
      // This is an array so we have to loop through it
      let output = '';

      data.forEach(function(post){
        output += `<li>${post.title}</li>`;
      });
      document.getElementById('output').innerHTML = output;

    })
    .catch(err => console.log(err));
}

Get External API Data

function getExternal() {
  fetch('https://api.github.com/users')
    .then(res => res.json())
    .then(data =>  {
      console.log(data);
      let output = '';

      data.forEach(function(user){
        output += `<li>${user.login}</li>`;
      });
      document.getElementById('output').innerHTML = output;

    })
    .catch(err => console.log(err));
}

Fetch API – Local text, json, external API

View Demo

Fetch API is a new standard for dealing with http requests.

Get Local Text File Data

document.getElementById('button1').addEventListener('click', getText);

function getText() {
  fetch('test.txt')
    .then(function(res){
      return res.text();
    })
    .then(function(data) {
      console.log(data);
      document.getElementById('output').innerHTML = data;
    })
    .catch(function(err){
      console.log(err);
    });
}

Get Local JSON Data

document.getElementById('button2').addEventListener('click', getJson);

// Get local json data
function getJson() {
  fetch('posts.json')
    .then(function(res){
      return res.json();
    })
    .then(function(data) {
      console.log(data);
      // This is an array so we have to loop through it
      let output = '';

      data.forEach(function(post){
        output += `<li>${post.title}</li>`;
      });
      document.getElementById('output').innerHTML = output;

    })
    .catch(function(err){
      console.log(err);
    });
}

Get external API data

document.getElementById('button3').addEventListener('click', getExternal);

function getExternal() {
  fetch('https://api.github.com/users')
    .then(function(res){
      return res.json();
    })
    .then(function(data) {
      console.log(data);
      // This is an array so we have to loop through it
      let output = '';

      data.forEach(function(user){
        output += `<li>${user.login}</li>`;
      });
      document.getElementById('output').innerHTML = output;

    })
    .catch(function(err){
      console.log(err);
    });
}

HTML

<!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">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.css" />
  <link rel="icon" href="#">
  <title>Ajax Sandbox</title>
</head>
<body>
  <div class="container">
    <h1>Fetch API Sandbox</h1>
    <button id="button1">Get Text</button> 
    <button id="button2">Get JSON</button>
    <button id="button3">Get API Data</button>
    <br><br>
    <div id="output"></div>
  </div>

  <script src="app.js"></script>
</body>
</html>

Fetch API with Bootstrap 5

View Demo

HTML

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="description" content="">
    <meta name="author" content="Mark Otto, Jacob Thornton, and Bootstrap contributors">
    <meta name="generator" content="Hugo 0.83.1">
    <title>Breaking Bad API with Bootstrap 5</title>
    <link rel="icon" href="#">

    <link rel="canonical" href="https://getbootstrap.com/docs/5.0/examples/album/">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-wEmeIV1mKuiNpC+IOBjI7aAzPcEZeedi5yW5f2yOq55WWLwNGmvvx4Um1vskeMj0" crossorigin="anonymous">


    <style>
      .bd-placeholder-img {
        font-size: 1.125rem;
        text-anchor: middle;
        -webkit-user-select: none;
        -moz-user-select: none;
        user-select: none;
      }

      @media (min-width: 768px) {
        .bd-placeholder-img-lg {
          font-size: 3.5rem;
        }
      }
    </style>

    
  </head>
  <body>
    
<header>
  <div class="collapse bg-dark" id="navbarHeader">
    <div class="container">
      <div class="row">
        <div class="col-sm-8 col-md-7 py-4">
          <h4 class="text-white">About</h4>
          <p class="text-muted">Add some information about the album below, the author, or any other background context. Make it a few sentences long so folks can pick up some informative tidbits. Then, link them off to some social networking sites or contact information.</p>
        </div>
        <div class="col-sm-4 offset-md-1 py-4">
          <h4 class="text-white">Contact</h4>
          <ul class="list-unstyled">
            <li><a href="#" class="text-white">Follow on Twitter</a></li>
            <li><a href="#" class="text-white">Like on Facebook</a></li>
            <li><a href="#" class="text-white">Email me</a></li>
          </ul>
        </div>
      </div>
    </div>
  </div>
  <div class="navbar navbar-dark bg-dark shadow-sm">
    <div class="container">
      <a href="#" class="navbar-brand d-flex align-items-center">
        <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" aria-hidden="true" class="me-2" viewBox="0 0 24 24"><path d="M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"/><circle cx="12" cy="13" r="4"/></svg>
        <strong>Fetch API</strong>
      </a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarHeader" aria-controls="navbarHeader" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
    </div>
  </div>
</header>

<main class="bg-dark">

  <section class="py-5 text-center container">
    <div class="row py-lg-5">
      <div class="col-lg-6 col-md-8 mx-auto">
        <h1 class="fw-light text-white">Breaking Bad API</h1>
        <p class="lead text-muted">Something short and leading about the collection below—its contents, the creator, etc. Make it short and sweet, but not too short so folks don’t simply skip over it entirely.</p>
        <p>
          <a href="#" id="button1" class="btn btn-lg btn-primary my-2 bg-danger bg-gradient border-0">Get Data</a>
        </p>
      </div>
    </div>
  </section>

  <div class="album py-5 bg-dark">
    <div class="container">

      <div id="output" class="row row-cols-1 row-cols-sm-2 row-cols-md-3 g-3">

      </div>
    </div>
  </div>

</main>

<footer class="text-muted py-5 bg-dark">
  <div class="container">
    <p class="float-end mb-1">
      <a href="#">Back to top</a>
    </p>
    <p class="mb-1">Album example is &copy; Bootstrap, but please download and customize it for yourself!</p>
    <p class="mb-0">New to Bootstrap? <a href="/">Visit the homepage</a> or read our <a href="/docs/5.0/getting-started/introduction/">getting started guide</a>.</p>
  </div>
</footer>


    <script src="app.js"></script>

      
  </body>
</html>

JavaScript

document.getElementById('button1').addEventListener('click', getExternal);

// Get external API data
function getExternal() {
  fetch('https://www.breakingbadapi.com/api/characters ')
    .then(function(res){
      return res.json();
    })
    .then(function(data) {
      // This is an array so we have to loop through it
      let output = '';

      data.forEach(function(character){
        output += `
        <div class="col">
        <div class="card text-center border-0">
          <div class="card-img-top" style="
            background-image: url(${character.img});
            background-size: cover;
            width: 100%;
            height: 500px;
          "></div>
          <h4 class="card-header">
            ${character.name} (${character.nickname})
          </h4>
          <ul class="list-group list-group-flush">
            <li class="list-group-item">${character.portrayed}</li>
            <li class="list-group-item">${character.occupation}</li>
          </ul>
        </div>

          <div class="card shadow-sm">
          </div>
        </div>
        
        `;
      });
      document.getElementById('output').innerHTML = output; 

    })
    .catch(function(err){
      console.log(err);
    });
}