ko.bindingHandlers.copyButton = {

  init: function(element, valueAccessor) {

    var text = ko.utils.unwrapObservable(valueAccessor());

​

    $(element).click(function() {

​

      var ta = document.createElement('textarea');

      document.body.appendChild(ta);

      ta.value = text;

      ta.select();

      var r = document.createRange();

      r.selectNode(ta);

      document.getSelection().addRange(r);

      document.execCommand('copy');

      document.body.removeChild(ta);

​

    });

  }

};

​

ko.applyBindings({});

​