JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://github.com/downloads/SteveSanderson/knockout/knockout-2.0.0.js"></script>

JavaScript

//1) what is an obserable
var habit = ko.observable('some habit');   

//4) but wait - they're 'observable'
habit.subscribe(function(newValue){
    //alert(newValue);
});


//2) how do you set an observable
habit('run 2 miles');


//3) how to get from an observable
//alert(habit());