knockout.js - Knockout select list value on change show/hide second select list -

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i using mvc 5 , knockout create page names listed , against each name there selection list (uniform data rows). on 'applybinding' visible-binding , css-binding works on subsequent change of selection of list item modified rows not respect either binding. script is...

function names(data){     var self = this;     self.id = ko.observable(data.id);     self.name = ko.observable(data.name);     self.reqstatus = ko.observable(data.reqstatus);     self.rejreason = ko.observable(data.rejreason);     self.showreason = ko.observale(false);      self.reqstatus.subscribe(function(newvalue){         if (newvalue == 2){             self.showreason = true;         }     });      self.statuscss = ko.computed(function(){         if (self.reqstatus() == 2) {             return "rejected";         }else if (self.showreason() == true){             return "rejected";         }else{             return "accepted";         }     }); }  function reason(data){     var self = this;     self.id = ko.observable(data.id);     self.text = ko.observable(data.text); }  var reasons = ko.observablearray([]); $.getjson(....gets reason json....)   function status(data){     var self = this;     self.id = ko.observable(data.id);     self.title = ko.observable(data.title); }  var listitems = ko.observablearray([]); $.getjson(....gets status json....)

is used populate listitems array

function viewmodel(data){     var self = this;     self.names = ko.observablearray(data);     $getjson(...gets names json .....) - fetch , map data      self.save = function(){         // code save data.         jsonarray = ko.tojson(this.names);         // here can see select list value change has been effected in observablearray of 'names'!     }      self.acceptcount = ko.computed(function(){         var acc = 0;         ko.utils.arrayforeach(.... value);     }); };  ko.applybindings(new viewmodel());

my html...

<div>    <p> total accepted :<span data-bind="text: acceptcount"></span></p>    <table>        <tbody data-bind="foreach: names">            <tr data-bind="css: statuscss">                <td><span data-bind="text: name"></span></td>                <td><select data-bind="options: listitems, optiontext: 'title', optionvalue:'id', value: reqstatus"></select> </td>                <td><select data-bind="options: reasons, optiontext: 'text', optionvalue:'id', value: rejreason, visible: showreason" ></select></td>            </tr>        </tbody>    </table> </div>

when load page; visible-binding , css-binding works great. 1 - problem when selected list item changed required visible-binding , css-binding not happen. however, when click on save button , convert array json, can see changes in selected list item there why not binding happening? 2 - when change select list item (the first one); there error if select value cause css change...

javascript runtime error: function expected

this error raised here

self.statuscss = ko.computed(function(){         if (self.reqstatus() == 2) {             return "rejected";         }else if (self.showreason() == true){ // <--- error here             return "rejected";         }else{             return "accepted";         }     }

i have fixed problem minor mistake...in computed property accessing observed property more once , reason not returning proper values , script error raised. modified code is...

    self.statuscss= ko.computed(function () {         var selectedval = self.reqstatus();         if (selectedval) {             if (selectedval === 2) {                 return "rejected";             } else if (selectedval === 7) {                 return "late";             }         };     });

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