Question

I am a pretty new to the wonderful MVC framework KnockoutJS. Is it possible to data bind multiple attributes together?

I want to data-bind CSS and style together for a particular element. For example,

I want to data-bind style and CSS together for an element, say h2 based on some conditions.

Answer 1

Yes, you can data bind multiple attributes. You need to separate each attribute with a comma.

For styling, it sort of depends on what you really want to do. As a start, check the knockout documentation –

• CSS Binding
• Style Binding

• For really customizable style, take a look at Ryan Niemeyer’s fiddle at Dynamic Styling,

      var viewModel = {
          size: ko.observable(2)
      };
  
      viewModel.style = ko.dependentObservable(function() {
          return "h2 { font-size: " + this.size() + "em }";
      }, viewModel);
  
      ko.applyBindings(viewModel);