Poor JavaScript example of LocalStorage

CanDownload.js

var CanDownload = localStorage.getItem('CanDownload');

// If localStorage variable 'CanDownload' isn't set yet, set it to true
if (CanDownload == null) {
  localStorage.setItem('CanDownload', true);
}

// function called when button is clicked
// changes CanDownload status to false
function ChangeButton () {
  localStorage.setItem('CanDownload', false);
}