JSFiddle - React, Tailwind, and code Playground

by Avi Algaly

HTML

<!-- This is a *view* - HTML markup that defines the appearance of your UI -->

<textarea data-bind="text: avi"></textarea>
<br/>
<p>First name: <strong data-bind="text: firstName"></strong></p>
<p>Last name: <strong data-bind="text: lastName"></strong></p>

<p>First name: <input data-bind="value: firstName" /></p>
<p>Last name: <input data-bind="value: lastName" /></p>

<p>Full name: <strong data-bind="text: fullName"></strong></p>

<button data-bind="click: capitalizeLastName">Go caps</button>
<br/>
<label data-bind="text: avi"/>

JavaScript

// This is a simple *viewmodel* - JavaScript that defines the data and behavior of your UI

function AppViewModel() {
    this.firstName = ko.observable("Bert");
    this.lastName = ko.observable("Bertington");
    this.avi = ko.observable("Hello");

    this.fullName = ko.computed(function() {
        return this.firstName() + " " + this.lastName();
    }, this);

    this.capitalizeLastName = function() {
        var currentVal = this.lastName(); // Read the current value
        this.lastName(currentVal.toUpperCase()); // Write back a modified value
    };
}

// Activates knockout.js
ko.applyBindings(new AppViewModel());