An quick intro to understanding callback functions via forms

async-callback-example.js

// First let's grab a form
console.log('first')
const someForm = document.getElementById('some-form')

// Next, we'll add an event listener with the event and a callback function
// Note that the anonymous function is 
someForm.addEventListener('submit', (evt) => {
  console.log('second')
  //this is an asynchronous function.  
})

console.log('third')

// Note that the log statements will be "first", "third", "second"