Imagine that I'm making a page that converts meters to millimeters. The obvious part of the haskell code is

convert :: Double -> Double convert = 1000 *

The part which isn't obvious to me is how I get input from the user or display the result. I know how to do that in the IO monad through standard haskell, but I wouldn't know how to handle it in Haskell compile to javascript for the web browser. I would have thought that you would need a binding to the DOM to read from forms and the like.

  $('#toggleLink').click(function() {
    if ($('#toggleLink').html() == 'Show') {
      showRollout();
      $('#toggleLink').html('Hide');
    } else {
      hideRollout();
      $('#toggleLink').html('Show');
    ]
  });