CODEWITHSUNDEEP
javascriptknockout.js
Dean Friedland
Dean Friedland

Reputation: 803

Unable to observe Knockout option selected from multi-select list

I am able to populate a multi-select list using the "options" binding in Knockout in the code below. Now I need to enable a button on the screen only when an option is selected. The problem is that I cannot figure out how to observe whether an option is selected or not. Anyone have an idea? 

<select size="8" multiple data-bind="options: viewsForClient, optionsValue: 'Value', optionsText: 'Text'"

Upvotes: 2

Views: 89

Answers (1)

indubitablee
indubitablee

Reputation: 8206

you need to use selectedOptions (read the knockout documentation: http://knockoutjs.com/documentation/selectedOptions-binding.html)

then on the button, you can data-bind something like enable: selectedOptionVariable.length > 0 to enable the button if the selectedOptionsVariable array has a value in it.

Upvotes: 2

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