Initializing all Floatl inputs

Make sure you've added the required markup first. After that it's easy to initialize all of the Floatl inputs on your page:

var elements = document.getElementsByClassName("floatl");

// In modern browsers
for (var element of elements) {
  new Floatl(element);
}

// In old browsers
Array.from(document.getElementsByClassName("floatl")).forEach(function(
  element
) {
  new floatl.Floatl(element);
});