code: function disabler(event) {
          if (event.keyCode === backspaceCode) {
              var node = event.srcElement || event.target
              // We don't want to disable the ability to delete content in form inputs and contenteditables
              if ( !isActiveFormItem(node) ) {
                  event.preventDefault()
              }
          }
      }
docs: See http://stackoverflow.com/questions/1495219/how-can-i-prevent-the-backspace-key-from-navigating-back