javascript - Retrieving value from select list with knockout.js -


i'm using knockout.js 2.3.0 , i'm trying retrieve value set in select list, can't work. when try alert value, either see javascript, undefined or [object object] (depending on i've tried).

the list populated fine , can set default value, can't retrieve it. doing wrong?

here's html list

<select data-bind='value: selectedmonth, options: $root.months, optionstext: "month"'></select>

and here's js

self.months = [{month: '-'},{month: '01'},{month: '02'},{month: '03'},{month: '04'},{month: '05'},{month: '06'},{month: '07'},{month: '08'},{month: '09'},{month: '10'},{month: '11'},{month: '12'}];  self.selectedmonth = ko.observable(self.months[0]);  self.submitbutton = function(){     alert(self.selectedmonth); //a bunch of javascript      alert(self.selectedmonth()); //object, object      alert(self.months[self.selectedmonth]); //undefined  }

here fiddle code

your second call 1 want:

self.selectedmonth()

this unwraps observable value. it's object, being example:

{ month: "03" }

this easier spot if console.log instead of alert.

in case, month value ask property:

alert(self.selectedmonth().month);

see this fiddle.


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