rough/bin/renderer-factory.js

import { RoughRenderer } from './renderer';
const hasSelf = typeof self !== 'undefined';
const roughScript = hasSelf && self && self.document && self.document.currentScript && self.document.currentScript.src;
export function createRenderer(config) {
    if (hasSelf && roughScript && self && self.workly && config.async && (!config.noWorker)) {
        const worklySource = config.worklyURL || 'https://cdn.jsdelivr.net/gh/pshihn/workly/dist/workly.min.js';
        if (worklySource) {
            const code = `importScripts('${worklySource}', '${roughScript}');\nworkly.expose(self.rough.createRenderer());`;
            const ourl = URL.createObjectURL(new Blob([code]));
            return self.workly.proxy(ourl);
        }
    }
    return new RoughRenderer();
}