JSFiddle - React, Tailwind, and code Playground

HTML

<span data-bind="text: txt, click: function(){ outsideFn() }"></span>

JavaScript

function outsideFn()
{
    console.log("outside funtion" + text + line); 
}
var vm = {
    "txt": ko.observable("some text")
}
ko.applyBindings(vm);