debian-mirror-gitlab/app/assets/javascripts/lib/utils/css_utils.js

export function loadCSSFile(path) {
  return new Promise(resolve => {
    if (!path) resolve();

    if (document.querySelector(`link[href="${path}"]`)) {
      resolve();
    } else {
      const linkElement = document.createElement('link');
      linkElement.type = 'text/css';
      linkElement.rel = 'stylesheet';
      // eslint-disable-next-line @gitlab/require-i18n-strings
      linkElement.media = 'screen,print';
      linkElement.onload = () => {
        resolve();
      };
      linkElement.href = path;

      document.head.appendChild(linkElement);
    }
  });
}