get.js

/*
Minimal AJAX get request method to fetch data. Example usage:
get('example.com/api/products/123')
  .then(product => console.log(product.name))
*/
function get(url) {
  return new Promise(res => {
    let xmlHttp = new XMLHttpRequest();
    xmlHttp.onreadystatechange = () => {
      if(xmlHttp.readyState == 4 && xmlHttp.status == 200) res(JSON.parse(xmlHttp.responseText));
    }
    xmlHttp.open('GET', url, true);
    xmlHttp.send();
  })
}