JSFiddle - React, Tailwind, and code Playground

JavaScript

var computed = ko.computed(function(){return 'foo';});
var observable  = ko.observable();
var observableArray  = ko.observableArray();

console.log('computed isObservable', ko.isObservable(computed));
console.log('observable isObservable', ko.isObservable(observable));
console.log('observableArray isObservable', ko.isObservable(observableArray));

console.log('computed isSubscribable', ko.isSubscribable(computed));
console.log('observable isSubscribable', ko.isSubscribable(observable));
console.log('observableArray isSubscribable', ko.isSubscribable(observableArray));