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));
}