Uncaught TypeError: Cannot read property 'nodeType' of nullThis problem was happening because of binding an HTML element before it was created. the script was loaded on top of the HTML (in the head) but it needed to be loaded at the bottom of my HTML code (just before the closing body tag).
Knockout Computed Observables
Adding two Numbers Checkbox Addition ( Reference ) Using Function Concatination Read Write Example ( Reference ) Read Write Example 2 Computed Reference Getting the Most out of Knockout.js Computed Observables Another Article .. Read write ( subscriber will be notified when you type in "valid") Pure Computed , read write Computed vs Pure Computed