I have code like this in my view model:

function ChatListViewModel(chats) {
    var self = this;

    self.newCommentText = ko.observable();

    self.addComment = function(chat) {
      var newComment = { CourseItemDescription: this.newCommentText() };
      chat.CommentList.push(newComment);
      self.newCommentText("");       
    };

}

ko.applyBindings(new ChatListViewModel(initialData));

but I get this error when I try to add a new ment:

any Ideas what I'm doing wrong? I looked at some knockout samples on the knockoutjs webpage and this is how they were doing it.

I have code like this in my view model:

function ChatListViewModel(chats) {
    var self = this;

    self.newCommentText = ko.observable();

    self.addComment = function(chat) {
      var newComment = { CourseItemDescription: this.newCommentText() };
      chat.CommentList.push(newComment);
      self.newCommentText("");       
    };

}

ko.applyBindings(new ChatListViewModel(initialData));

but I get this error when I try to add a new ment:

any Ideas what I'm doing wrong? I looked at some knockout samples on the knockoutjs. webpage and this is how they were doing it.

• javascript
• knockout.js

Share Improve this question Follow asked Jun 13, 2012 at 20:29 ladookieladookie 1,37144 gold badges2121 silver badges2525 bronze badges

Add a ment  | 

1 Answer 1

Sorted by: Reset to default 5

Try this.

self.addComment = function(chat) {
   var newComment = { CourseItemDescription: self.newCommentText() };
   chat.CommentList.push(newComment);
   self.newCommentText("");       
};

Your this variable is not what you expect.

Hope this helps.