This example of knockout js works so when you edit a field and press TAB, the viewmodel data and hence the text below the fields is updated.
How can I change this code so that the viewmodel data is updated every keypress?
<!doctype html>
<html>
<title>knockout js</title>
<head>
<script type="text/javascript" src="https://stackoverflow.com/questions/4386311/js/knockout-1.1.1.debug.js"></script>
<script type="text/javascript">
window.onload= function() {
var viewModel = {
firstName : ko.observable("Jim"),
lastName : ko.observable("Smith")
};
viewModel.fullName = ko.dependentObservable(function () {
return viewModel.firstName() + " " + viewModel.lastName();
});
ko.applyBindings(viewModel);
}
</script>
</head>
<body>
<p>First name: <input data-bind="value: firstName" /></p>
<p>Last name: <input data-bind="value: lastName" /></p>
<h2>Hello, <span data-bind="text: fullName"> </span>!</h2>
</body>
</html>