JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://knockoutjs.com/downloads/knockout-3.2.0.js"></script>
<input type="text" data-bind="value: goal" />
<div data-bind="click: outsideClick">
  Outside click.

  <button data-bind="click: insideClick">
    Inside click.
  </button>
</div>

JavaScript

function AppViewModel() {
  var self = this;
  self.goal = ko.observable(3);

  self.outsideClick = function() {
    alert('outside click');
  };
  self.insideClick = function() {
    alert('inside click');
  };

}

var vm = new AppViewModel();

ko.applyBindings(vm);