JSFiddle - React, Tailwind, and code Playground
JavaScript
// promise
console.log('hello!');
new Promise(function(resolve){ resolve(); }).then(function(){ console.log('promise'); });
console.log('is monday!');
// callback
console.log('hello!');
(function(cb){ cb() })(function(){ console.log('callback'); });
console.log('is monday!');