Knockout - demo checkbox enable

by RobertSudwarts

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/knockout/2.3.0/knockout-min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/knockout.mapping/2.3.5/knockout.mapping.js"></script>
<p>
    <input type='checkbox' data-bind="checked: hasCellphone" />
    I have a cellphone
</p>
<p>
    Your cellphone number:
    <input type='text' data-bind="value: cellphoneNumber, enable: hasCellphone" />
</p>

JavaScript

var viewModel = {
        hasCellphone : ko.observable(false),
        cellphoneNumber: ""
};
ko.applyBindings(viewModel);