[{"data":1,"prerenderedAt":63},["ShallowReactive",2],{"\u002Fglossary\u002Fblocking-css-js-requests":3,"\u002Fglossary\u002Fblocking-css-js-requests:related":46},{"id":4,"title":5,"author":6,"authorImage":7,"body":8,"category":31,"date":32,"description":33,"draft":34,"extension":35,"letter":36,"meta":37,"navigation":38,"path":39,"readTime":40,"related":41,"seo":42,"stem":44,"term":5,"__hash__":45},"glossary\u002Fglossary\u002Fblocking-css-js-requests.md","Blocking CSS\u002FJS Requests","Fabian Krumbholz","\u002Fimages\u002Fauthors\u002Ffabian-krumbholz.webp",{"type":9,"value":10,"toc":27},"minimark",[11],[12,13,14,18,19,22,23,26],"p",{},[15,16,17],"strong",{},"Blocking"," (or render-blocking) requests are requests for CSS or JavaScript files that the browser must download, parse, and execute before it can continue rendering the rest of the page. These resources are a major cause of slow load times because they block the ",[15,20,21],{},"Main Thread"," and delay the ",[15,24,25],{},"First Contentful Paint",". A key performance strategy is to eliminate or minimize blocking requests.",{"title":28,"searchDepth":29,"depth":29,"links":30},"",2,[],null,"October 9, 2025","Blocking (or render-blocking) requests are requests for CSS or JavaScript files that the browser must download, parse, and execute before it can continue rendering the rest of the page.",false,"md","B",{},true,"\u002Fglossary\u002Fblocking-css-js-requests","1 min read",[],{"title":43,"description":33},"Blocking CSS\u002FJS Requests: Definition | Web Performance Glossary","glossary\u002Fblocking-css-js-requests","iYgk7C-7GOdZf9p1xFy27IzRMCiZkgRoRkwWq-Fif7Y",[47,51,55,59],{"path":48,"title":49,"description":50,"letter":36},"\u002Fglossary\u002Fback-forward-cache-bfcache","Back\u002FForward Cache (bfcache)","The back\u002Fforward cache (or bfcache) is a browser optimization that enables instant navigations when a user clicks the back or forward buttons.",{"path":52,"title":53,"description":54,"letter":36},"\u002Fglossary\u002Fbackend","Backend","The backend refers to the server-side components of a web application that are not visible to the end-user. This includes the web server, application logic, and databases.",{"path":56,"title":57,"description":58,"letter":36},"\u002Fglossary\u002Fbackend-cache-aws","Backend Cache (AWS)","This is Speed Kit's central, primary cache where Anonymous HTML and other website assets are stored. It is hosted on Amazon Web Services (AWS), a secure and highly reliable cloud computing platform.",{"path":60,"title":61,"description":62,"letter":36},"\u002Fglossary\u002Fbackend-time","Backend Time","Backend Time is the duration it takes for a website's Origin Server to process a request and generate the HTML for a page.",1787756712957]