Selecting One at a time validation

[simhadri....@snl.com]

Goto http://knockoutjs.com/examples/controlTypes.html

Multi-select drop-down list: I have below requirement 

Both Alpha and Beta Cannot be selected. Only one should be selected at a time.

Let say I have selected Alpha and then Continuing to select Beta Then Alpha should be unchecked and beta should be selected. The same goes vice versa.

 Do we have any solution using knockout js for this problem?

[noirabys]

hi,

so you want a multiselect box to be singlechoice only ?

i guess that it is not recommended because of user experience, but a hacky way might be:

add a subscribe to the result array with "beforeChange" option and reset the underlying array ?!

ko.contextFor($('select')[0]).$root.multipleSelectedOptionValues.subscribe(function(newVal){ this().splice(0,this().length);},ko.contextFor($('select')[0]).$root.multipleSelectedOptionValues,"beforeChange");

best regards,

  noirabys

btw there seems to be an error on the page:

Uncaught Error: Syntax error, unrecognized expression: .main-menu a[rel=]

[Gunnar Liljas]

Conceptual version:

http://jsfiddle.net/ZbrB7/4119/

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