CODE EXAMPLE FOR JAVASCRIPT

js promis with ajax

function doTheThing() {
  return new Promise((resolve, reject) => {
    $.ajax({
      url: window.location.href,
      type: 'POST',
      data: {
        key: 'value',
      },
      success: function (data) {
        resolve(data)
      },
      error: function (error) {
        reject(error)
      },
    })
  })
}