Getting Started

Learn how to install, set up, and create your first AsaJS project.

System requirements

Before you get started, make sure you have:

• Node.js installed
• Windows or Linux

Installation

Install the core package using npm:

npm install asajs

Tip: It's recommended to use a src directory to organize your project.

In your package.json, you can optionally add these scripts for development and production builds:

{
	"type": "module",
	"scripts": {
		"dev": "node --watch src/app.js",
		"build": "node src/app.js"
	}
}

Project Structure

Create a src directory and a main entry file inside it:

mkdir src
touch src/app.js

Sample Usage (src/app.js)

import { Anchor, BindingName, UI, Vanilla } from "asajs"

// Game start screen content
const vanillaStartScreenContent = Vanilla.start.startScreenContent()

// A custom start screen
const ourStartScreenContent = UI.panel({ size: "100%" }).addChild(vanillaStartScreenContent)

// Toggle for hide start screen
const ourToggle = UI.extend(Vanilla.commonToggles.lightTextToggle(), {
	w: 84,
	h: 28,
	$button_text: "Hide Screen",
	$toggle_name: "hide_start_screen",
	$toggle_view_binding_name: "hide_start_screen_state",
})

// Add toggle to start screen content
ourStartScreenContent.addChild(ourToggle, {
	anchor: Anchor.TopLeft,
	x: 5,
	y: 5,
})

vanillaStartScreenContent.override.addBindings([
	{
		binding_name: BindingName.ScreenNeedsRebuild,
		binding_name_override: "#bind_0",
	},
	{
		source_control_name: "hide_start_screen_state",
		source_property_name: "#toggle_state",
		target_property_name: "#bind_1",
	},
	{
		source_property_name: "[!#bind_0 && !#bind_1]",
		target_property_name: "#visible",
	},
])

// Modify start screen content
Vanilla.start.startScreen({
	$screen_content: ourStartScreenContent.getPath(),
})

Tip: You can find the Bedrock Samples repository for vanilla Minecraft UI paths.

Building the Project

To compile the DSL and generate a resource pack:

npm run build

For live rebuilding during development:

npm run dev

Output

The build process generates a full JsonUI-compatible resource pack, stored in:

• .build - compiled output
• .minecraft - symbolic link for automatic installation (if configured)

Example Projects

Want to see AsaJS in action? Here are some example projects to help you get started quickly:

• Live Wallpaper Generator - Generate live wallpapers for your favorite UI Resource Packs.
• ItemID Viewer - A tool to view Item IDs as text in Minecraft: Bedrock Edition (This package updates automatically with each version, but users must update it manually here).

Next: Defining Elements

Defining Elements: Learn how to define and structure elements using AsaJS.

Contributors