As the name specifies this binding makes the related DOM element to be visible or hidden based on the value passed in the binding.
Syntax
visible: <binding-condition>
Parameters
When the parameter transforms into false (like false/0/null/undefined), then the binding sets display:none for the element to making it as hidden.
When the parameter transforms into true (true/non-null/array ), the binding removes the element’s display value and makes it visible.
Example
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<html> <head> <title>KnockoutJS Computed Observables</title> <script src="https://ajax.aspnetcdn.com/ajax/knockout/knockout-3.4.2.js"></script> </head> <body> <a href="#" data-bind="click: toggleVisibility">Show/Hide Text</a> <br/><br /> <div data-bind="visible: shouldShowMessage"> Welcome To Dotnet-helpers.com Learning Curve </div> <script type="text/javascript"> var viewModel = function () { this.shouldShowMessage = ko.observable(true); this.toggleVisibility = function () { this.shouldShowMessage(!this.shouldShowMessage()); alert('shouldShowMessage status ' + this.shouldShowMessage()); }; }; ko.applyBindings(new viewModel()); </script> </body> </html> |
OUTPUT
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