1= javascript_tag do
2  :plain
3    document.querySelectorAll('link[media="print"]').forEach(linkTag => {
4      linkTag.setAttribute('data-startupcss', 'loading');
5      const startupLinkLoadedEvent = new CustomEvent('CSSStartupLinkLoaded');
6      linkTag.addEventListener('load',function(){this.media='all';this.setAttribute('data-startupcss', 'loaded');document.dispatchEvent(startupLinkLoadedEvent);},{once: true});
7    })
8