polygonjs-engine/dist/src/core/loader/Stylesheet.js

node-based webgl 3D engine https://polygonjs.com

import {Poly as Poly2} from "../../engine/Poly";
export class CoreStylesheetLoader {
  static loadUrl(url) {
    const elements = url.split(".");
    const ext = elements[elements.length - 1];
    if (ext != "css") {
      url = `${url}.css`;
    }
    if (!Poly2.inWorkerThread()) {
      const id = url.replace(/[\W_]+/g, "_");
      let stylesheet = document.getElementById(id);
      if (!stylesheet) {
        stylesheet = document.createElement("link");
        stylesheet.type = "text/css";
        stylesheet.rel = "stylesheet";
        stylesheet.href = `${url}?${performance.now()}`;
        stylesheet.id = id;
        document.getElementsByTagName("head")[0].appendChild(stylesheet);
      }
    }
  }
}