ShadowEditor/ShadowEditor.Web/src/loader/DRACOLoader.js

import BaseLoader from './BaseLoader';

/**
 * DRACOLoader
 * @author tengge / https://github.com/tengge1
 */
function DRACOLoader() {
    BaseLoader.call(this);
}

DRACOLoader.prototype = Object.create(BaseLoader.prototype);
DRACOLoader.prototype.constructor = DRACOLoader;

DRACOLoader.prototype.load = function (url) {
    return new Promise(resolve => {
        THREE.DRACOLoader.setDecoderPath('assets/js/loader/draco/');
        THREE.DRACOLoader.setDecoderConfig({ type: 'js' });

        var loader = new THREE.DRACOLoader();

        loader.load(url, geometry => {
            geometry.computeVertexNormals();

            var material = new THREE.MeshStandardMaterial();
            var mesh = new THREE.Mesh(geometry, material);

            // Release decoder resources.
            THREE.DRACOLoader.releaseDecoderModule();

            resolve(mesh);
        }, undefined, () => {
            resolve(null);
        });
    });
};

export default DRACOLoader;