Unable to parse bindings in Knockout.js -


facing common "binding issue". below viewmodel

    function detaillistviewmodel() {      this.details = new details();     this.productdetails = ko.observablearray([]);      this.show = function (item) {         $.getjson("products.json", {}, function (data) {             this.productdetails.push(this.details.init(data));         });     };     }      function details() {     this.author = ko.observable();     this.text = ko.observable();     this.init = function (temp) {         return {             author: temp.author,             text: temp.text         };     };     }      var tasklistviewmodel = {         tasks: ko.observablearray([]),     addtask: function () {     self.tasks.push(new task({ bomid: this.bomid() }, { createdby: this.createdby() }));     },     showproductinfo: function (item) {                detaillistviewmodel.show(item);     }     };       $(function () {         $.getjson("tasks.json", function (alldata)       {             tasklistviewmodel.tasks.push(tokoobserable($.parsejson(alldata.getdataresult).result.document));         ko.applybindings(tasklistviewmodel);         var detaillistviewmodel = new detaillistviewmodel();         ko.applybindings(detaillistviewmodel);     });      function tokoobserable(blog) {         return {             bomid: ko.observable(blog[0].bomid),             createdby: ko.observable(blog[0].createdby)         };     } });

i getting error 

uncaught error: unable parse bindings. message: referenceerror: author not defined; bindings value: text:author

my html : 

<h3  data-bind="text:author">/h3>

i pretty sure if change details implementation should work expect it. not sure why details list contains single details instance , create observable array of details reusing object. not seem right design point of view. init not return observable values. try changing along these lines:

function details(author, text) {     this.author = ko.observable(author);     this.text = ko.observable(text); }

then when populate details list do:

function detaillistviewmodel() {     this.productdetails = ko.observablearray([]);      this.show = function (item) {         $.getjson("products.json", {}, function (data) {             this.productdetails.push(new details(data.author, data.text));         });     }; }

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