Render-blocking resources

Render-blocking resources

Any website that loads slowly has probably run into render blocking resources. Rendering a site means making it show up the way it is intended. If that process gets blocked in any way, the website either does not load properly or takes a very long time to do so. When the things go slowly, you lose site visitors, reputation, and rankings on Google and other major search engines.

What are the most common render-blocking resources? Although other possibilities exist, the things that most often get in the way of smooth site rendering include CSS and JavaScript files. These are the ones that are called upon in the head section of the website’s HTML code. Their position above the fold means that they must load before any of the basic text or data on the site does. If something stops them or simply slows them down, the entire website will not display promptly.

Internet browsers figure out what to display based on all of the files associated with the website itself. With JS and CSS resources listed high up in the HTML, the browser tries to render those first. It reads the CSS and then the JavaScript and then has to come back and show those things on the site before it even gets to the rest of the HTML. If you use a content management system like WordPress, additional files to operate CMS itself exist.

Each of these things can considerably slow down how quickly the website appears to the casual visitor. When you get rid of render-blocking resources and improve how the browser grabs the different pieces of information, low times get smaller and smaller. Things like proper code, fewer CSS or JS files, and some in-line rendering information may help.

An easy way to solve the render-blocking resources, is using “Load JavaScript deferred” & “Optimize CSS delivery” in wp rocket caching plugin.

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