JSFiddle - React, Tailwind, and code Playground

by techiedelight

JavaScript

var url = 'https://secure.gravatar.com/avatar?d=wavatar';

window.addEventListener("load", event => {
  fetch(new Request(url, {method: 'HEAD', mode: 'no-cors'}))
  .then(function() {
    alert('success');
  })
  .catch(function() {
    alert('failure');
  });
});