iOS input focused inside fixed parent stops position update of fixed elements

It’s a well known bug on Safari, both on iPad and iPhone.

A workaround it’s to change the position to absolute to all elements set with fixed position.

In case you are using Modernizr you could also target mobile devices this way:

jQuery code

$(document).ready(function() {

  if (Modernizr.touch) {

      $(document)

        .on('focus', 'input', function(e) {
            $('body').addClass('fixfixed');
        })

        .on('blur', 'input', function(e) {
            $('body').removeClass('fixfixed');
        });

      }

});

CSS

If I want to target just the header and footer for example, that are set with fixed position, when the class ‘fixfixed’ is added to the body I can change the position to absolute to all elements with fixed position.

.fixfixed header, .fixfixed footer {
  position: absolute;
}