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TKO v4.0.1
Playground llms.txt
Docs in progress TKO docs are in progress. Examples, API details, and migration notes are still being revised.

Introduction

TKO v4.0.1 is here →

TKO

Battle-tested since 2010

Observable data binding. Zero dependencies, zero ceremony. Ship a dynamic web UI in seconds.

Get startedTry the Playground

Quick start

Section titled “Quick start”

Browser

Section titled “Browser”
<script type="module">
  import ko from 'https://esm.run/@tko/build.reference'
  const name = ko.observable('TKO')
</script>

Package manager

Section titled “Package manager”
Terminal window
npm install @tko/build.reference

For Knockout 3.x compatibility, use @tko/build.knockout instead.

First binding example

Section titled “First binding example”
<div id="app">
  <label>
    Name
    <input data-bind="textInput: name" />
  </label>
  <p>Hello, <strong data-bind="text: name"></strong>.</p>
</div>


<script src="https://cdn.jsdelivr.net/npm/@tko/build.reference/dist/browser.min.js"></script>
<script>
  const ko = globalThis.tko
  ko.applyBindings({ name: ko.observable('TKO') }, document.getElementById('app'))
</script>

Choose a build

Section titled “Choose a build”
Recommended

@tko/build.reference

Modern path with TSX, ko-* attributes, native provider, and strict equality in expressions.

Knockout 3.x migrations

@tko/build.knockout

Compatibility-focused. Drop-in replacement for existing Knockout applications.

What stays familiar

Section titled “What stays familiar”
  • Observables and computed values — ko.observable, ko.observableArray, ko.computed
  • Declarative bindings — data-bind="text: msg" and the same binding APIs
  • Components and custom bindings — the component system and binding extensibility
Section titled “What to read next”
Core docs

Bindings

Binding syntax, common bindings, and view updates.

State model

Observables

Observables, observable arrays, extenders, and rate limiting.

Composition

Components

Reusable UI, loading strategies, and component architecture.

See it in action

Examples

Interactive demos showing observable updates, dependency graphs, and reactive state.

Community

Section titled “Community”