Learn BLOCKLY with Real Code Examples

Updated Nov 25, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Installation Setup

Install via npm or CDN

Import Blockly scripts into web project

Configure toolbox XML

Create a Blockly workspace

Add custom blocks if needed

Environment Setup

Create HTML container

Inject Blockly workspace

Load toolbox XML

Include blocks & generators

Test in browser

Config Files

toolbox.xml

custom_blocks.js

generators.js

themes/*.js

workspace.json

Cli Commands

Blockly has no built-in CLI

Use npm builds

Bundle with webpack/Vite

Generate build via npm scripts

Use community CLIs for packaging

Internationalization

Dozens of languages supported

Message files for translations

Custom locale support

Unicode-compatible

RTL layout support

Accessibility

Keyboard navigation

Screen reader support (in progress)

High contrast themes

Resizable UI

Multi-language support

Ui Styling

Custom themes supported

Block color palettes

Rounded block shapes

Configurable toolbox

Dark/light themes

State Management

Workspace event listeners

XML import/export

JSON serialization

Undo/redo stacks

Custom block state fields

Data Management

XML-based save/load

JSON-based workspace storage

LocalStorage persistence

Cloud syncing (custom)

Import/export functionality