three.js/examples/jsm/node-editor/materials/StandardMaterialEditor.js

import { ObjectNode, ColorInput, SliderInput, LabelElement } from '../../libs/flow.module.js';
import { MeshStandardNodeMaterial } from '../../renderers/nodes/Nodes.js';
import * as THREE from '../../../../build/three.module.js';

export class StandardMaterialEditor extends ObjectNode {

	constructor() {

		const material = new MeshStandardNodeMaterial();

		super( 'Standard Material', 0, material );

		this.title.setStyle( 'blue' );

		this.setWidth( 300 );

		const color = new LabelElement( 'color' ).setInput( 3 );
		const opacity = new LabelElement( 'opacity' ).setInput( 1 );
		const metalness = new LabelElement( 'metalness' ).setInput( 1 );
		const roughness = new LabelElement( 'roughness' ).setInput( 1 );

		color.add( new ColorInput( material.color.getHex() ).onChange( ( input ) => {

			material.color.setHex( input.getValue() );

		} ) );

		opacity.add( new SliderInput( material.opacity, 0, 1 ).onChange( ( input ) => {

			material.opacity = input.getValue();

			this.updateTransparent();

		} ) );

		metalness.add( new SliderInput( material.metalness, 0, 1 ).onChange( ( input ) => {

			material.metalness = input.getValue();

		} ) );

		roughness.add( new SliderInput( material.roughness, 0, 1 ).onChange( ( input ) => {

			material.roughness = input.getValue();

		} ) );

		color.onConnect( () => this.update(), true );
		opacity.onConnect( () => this.update(), true );
		metalness.onConnect( () => this.update(), true );
		roughness.onConnect( () => this.update(), true );

		this.add( color )
			.add( opacity )
			.add( metalness )
			.add( roughness );

		this.color = color;
		this.opacity = opacity;
		this.metalness = metalness;
		this.roughness = roughness;

		this.material = material;

		this.update();

	}

	update() {

		const { material, color, opacity, roughness, metalness } = this;

		color.setEnabledInputs( ! color.linkedExtra );
		opacity.setEnabledInputs( ! opacity.linkedExtra );
		roughness.setEnabledInputs( ! roughness.linkedExtra );
		metalness.setEnabledInputs( ! metalness.linkedExtra );

		material.colorNode = color.linkedExtra;

		material.opacityNode = opacity.linkedExtra || null;

		material.metalnessNode = metalness.linkedExtra;
		material.roughnessNode = roughness.linkedExtra;

		material.dispose();

		this.updateTransparent();

		// TODO: Fix on NodeMaterial System
		material.customProgramCacheKey = () => {

			return THREE.MathUtils.generateUUID();

		};

	}

	updateTransparent() {

		const { material, opacity } = this;

		material.transparent = opacity.linkedExtra || material.opacity < 1 ? true : false;

		opacity.setIcon( material.transparent ? 'ti ti-layers-intersect' : 'ti ti-layers-subtract' );

	}

}