Wijmo UI for the Web
KO DropDown Binding
Wijmo User Guide > Concepts > Integrating Frameworks > Knockout > Two-Way Live Binding > KO DropDown Binding

Data-binding options:

Example:
In this example, the ViewModel is defined specifically for use with the dropdown. If the value of a wijdropdown data-binding option changes, then the widgets will automatically respond. The widgets also update the ViewModel values as they modify them. 

Create a ViewModel:

ViewModel Script
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var viewModel = function () {this.check = ko.observable(true)};

Create View with Bound Controls:

View Markup
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<h3>Dropdown with Optgroups</h3>     <select id="select2" data-bind="wijdropdown: {}">          <optgroup label="A-G">                    <option>A</option>           <option selected="selected">B</option>           <option>C</option>           <option>D</option>           <option>E</option>           <option>F</option>           <option>G</option>     </optgroup>          <optgroup label="H-M">           <option>H</option>           <option>I</option>           <option>J</option>           <option>K</option>           <option>L</option>           <option>M</option>           </optgroup>      </select>
See Also

Concepts

Widgets

Reference