Function installDemo

tools/build_browser.js:91–100

(languages, { minify })

}

async function installDemo(languages, { minify }) {
  log("Writing demo files.");
  mkdir("demo");
  installDemoStyles();

  const assets = await glob("./demo/*.{js,css}");
  assets.forEach((file) => install(file));

  renderIndex(languages, minify);
}

async function renderIndex(languages, minify) {
  languages = languages.filter((lang) =>