Concept

Extension is an important concept in G6, it is a general term for all expandable parts in G6, including the following types:

• Animation
• Behavior
• Element
  • Node
  • Edge
  • Combo
• Layout
• Palette
• Plugin
• Theme
• Transform

Register Extension

G6 provides the register function for registering extensions, for example:

import { register, ExtensionCategory } from '@antv/g6';
import { CustomNode } from './my-custom-node';

// # Registering Nodes
register(ExtensionCategory.NODE, 'custom-node', CustomNode);

The first parameter of the register function is the type of the extension, the second parameter is the name of the extension, and the third parameter is the implementation of the extension.

Different types of extensions can use the same extension name, but when registering extensions of the same type, only the first registration will take effect.

// ✅
register(ExtensionCategory.NODE, 'custom-name', CustomNode);
register(ExtensionCategory.COMBO, 'custom-name', CustomCombo);

// ❌
register(ExtensionCategory.NODE, 'custom-name', CustomNode);
register(ExtensionCategory.NODE, 'custom-name', CustomNode);

Use Extension

The configuration location for different types of extensions varies, but all are used by specifying the name that was used during registration, for example:

• Using node extensions: options.node.type
• Using edge extensions: options.edge.type
• Using combo extensions: options.combo.type
• Using behavior extensions: options.behaviors
• Using layout extensions: options.layout.type
• Using plugin extensions: options.plugins
• Using theme extensions: options.theme
• Using data transform extensions: options.transform
• Using palette extensions: options.node.palette, options.edge.palette, etc.
• Using animation extensions: options.node.animate, options.edge.animate, etc.

Get Extension

G6 provides the getExtension and getExtensions methods to obtain a single extension and all extensions of a specified type, respectively, for example:

import { getExtension, getExtensions, ExtensionCategory } from '@antv/g6';

// To get the implementation of the node extension registered with the name 'custom-node'
getExtension(ExtensionCategory.NODE, 'custom-node');

// Retrieve all registered node extension implementations
getExtensions(ExtensionCategory.NODE);