Question

I’m studying Knockoutjs and I’m doing some low-level experiments.

Following an existing jsFiddle ko sample I updated it adding another element binding it with visible.

Follow this link: http://jsfiddle.net/LkqTU/215/

I want to see the last paragraph only when the computed strings.length are > than 0.

Answer 1

Look at your definition of fullName:

return viewModel.firstName() + " " + viewModel.lastName();

As you’ve defined it, fullName is always at least length 1 because of the space. If you change > 0 to > 1 it works fine.