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>
<div>
    <label for="chk">I have a cellphone</label>
    <input type='checkbox' id="chk" data-bind="checked: hasCellphone" />
    <br/>
    Your cellphone number: 
    <input type='text' data-bind="value: cellphoneNumber, enable: hasCellphone" />
</div>

JavaScript

var viewModel = {
        hasCellphone : ko.observable(false),
        cellphoneNumber: "07968 512 546"
};
ko.applyBindings(viewModel);