render-blocking

问题 I'm trying to optimalize web for speed and wanna ask about Eliminating render-blocking CSS and JS. by JS 'm only using async attr. - lets say, throwin' it at plugins like flexslider, lightbox.. but should I also use this with the base scripts like ?: <script src="https://cdnjs.cloudflare.com/.../4.5.3/js/bootstrap.min.js" async></script> <script src="js/script.js" async></script> Whenever i add async on some script and test it, that .js script won't just operate - as if not linked. What am I

问题 I am attempting to load all js files using approach explained in this video @3:30 Optimize your code: load code at the right time I have implemented this approach in index.js as <script> var scripts = '<script src="./js/jquery-3.5.1.min.js"/>'+ '<script src="./js/jquery-ui.min.js"/>'+ '<script src="./js/bootstrap.min.js"/>'+ '<script src="./js/index.js"/>'; $(window).on("load",function(){ $("body").append(scripts) }); </script> also tried as in html head tag <script> var scripts = '<script

问题 See: https://developers.google.com/speed/docs/insights/BlockingJS Google is talking there about "Render-Blocking JavaScript", but in my opinion that term is incorrect, confusing and misleading. It almost looks like "Google" is also not understanding it? This point is that Javascript execution is always pausing / blocking rendering AND also always pausing / blocking the "HTML parser" (at least in Chrome and Firefox). It's even blocking it in case of an external js file, in combination with an