30-seconds-of-code/snippets/httpGet.md

httpGet

Makes a GET request to the passed URL.

Use XMLHttpRequest web api to make a get request to the given url. Handle the onload event, by running the provided callback function. Handle the onerror event, by running the provided err function. Omit the third argument, err to log the request to the console's error stream by default.

const httpGet = (url, callback, err = console.error) => {
  const request = new XMLHttpRequest();
  request.open("GET", url, true);
  request.onload = () => callback(request);
  request.onerror = () => err(request);
  request.send();
}

httpGet('https://website.com/posts', request => {
  console.log(request.responseText);
}); // 'Retrieves all users from the database'