What Are Render-Blocking Resources?<\/h2>\n\n\n\n
When we talk about render-blocking resources, we\u2019re usually referring to CSS and JavaScript files. However, not all CSS and JavaScript files are render-blocking.<\/p>\n\n\n\n
For example, it\u2019s crucial to load critical CSS files first to avoid a flash of unstyled content (FOUC) when the page is loading.<\/p>\n\n\n\n
When a website loads in a browser, the browser processes scripts in a specific order. Ideally, this script queue should be empty before the website starts rendering.<\/p>\n\n\n\n
Render-blocking resources are those JavaScript and CSS files in the queue that prevent the website from fully displaying on the visitor\u2019s screen. If the queue is too long, it can delay the website\u2019s load time, which is why these resources are considered a major cause of slow performance.<\/p>\n\n\n\n
Many scripts aren\u2019t essential for the initial page display, and this is where the issue lies. These non-essential scripts, often referred to as “above the fold” elements, should be delayed until the main content is fully loaded on the screen. This approach ensures that the website loads faster and the user sees the most important content first.<\/p>\n\n\n\n
Why Is It Important to Eliminate Render-Blocking Resources in WordPress?<\/h2>\n\n\n\n
Website speed is one of the top priorities for any successful site. It directly affects user experience, retention, and engagement. When visitors come to your website, they expect it to load quickly and smoothly.<\/p>\n\n\n\n
If your site takes too long to load, users are more likely to leave and look for a faster alternative. In today\u2019s fast-paced online world, people don\u2019t have the patience to wait for slow-loading websites. In fact, they can judge a website\u2019s performance in just a few seconds, and that quick assessment could determine whether they stay or leave.<\/p>\n\n\n\n
Speed doesn\u2019t just affect user retention but it also plays a major role in search engine rankings. Search engines like Google prioritize fast-loading websites and reward them with higher rankings. So, improving your site\u2019s speed is important for both user experience and SEO.<\/p>\n\n\n\n
Eliminating render-blocking resources (like JavaScript and CSS) in WordPress can greatly improve your website’s load times. These resources can delay the rendering of your page, slowing things down. By optimizing or deferring the loading of these files, you can speed up your website<\/a> and create a better experience for your visitors.<\/p>\n\n\n\n To identify render-blocking resources on your WordPress site, the first step is identifying which files are causing the delay. Various tools can help you find these resources and provide actionable recommendations for improvement.<\/p>\n\n\n\n One of the most popular tools for identifying render-blocking resources is Google PageSpeed Insights<\/a>. This tool offers a comprehensive performance report, including specific recommendations on how to speed up your site by eliminating render-blocking resources.<\/p>\n\n\n\n How to use PageSpeed Insights:<\/strong><\/p>\n\n\n\n By reviewing this list, you\u2019ll know exactly which resources to address to improve your site’s speed.<\/p>\n\n\n\n While PageSpeed Insights is a great starting point, there are other tools you can use to further analyze and identify render-blocking resources.<\/p>\n\n\n\n By using these tools, you can easily identify which files are slowing down your WordPress site and take the right steps to eliminate render-blocking resources, improving your site\u2019s overall performance.<\/p>\n\n\n\n To remove render-blocking resources in WordPress, you can either optimize your site<\/a>‘s code manually or use plugins for a faster solution. Both approaches help improve site speed and enhance the user experience by reducing delays in page loading.<\/p>\n\n\n\n One of the crucial steps to speed up your WordPress site performance is to eliminate render-blocking CSS. Render-blocking CSS delays your page from loading, which can hurt both your SEO and user experience. Let\u2019s look at the strategies for how you can optimize CSS delivery and reduce or eliminate render-blocking CSS.<\/p>\n\n\n\n A simple step you can take is to avoid using the @import rule<\/strong> in your CSS files. While @import lets you reference other CSS files within your stylesheet, it causes a problem: it creates a render-blocking request chain.<\/p>\n\n\n\n When a browser sees the @import rule, it will first load the referenced CSS file, delaying the page load. Instead, link to your CSS files separately<\/strong> in the <head> section of your HTML document.<\/p>\n\n\n\n For example, instead of:<\/p>\n\n\n\n Use this:<\/p>\n\n\n\n To prioritize important stylesheets, you can use the rel=”preload”<\/strong> attribute to tell the browser to load them earlier:<\/p>\n\n\n\n Over time, websites often accumulate unused CSS. Some styles are loaded even though they aren’t needed for certain pages or elements, wasting bandwidth and slowing down your site. To find unused CSS, use the Coverage tab<\/strong> in your browser\u2019s Developer Tools. This feature shows which CSS rules are loaded but not used.<\/p>\n\n\n\n After identifying the unused code, you can safely remove it. This reduces the amount of CSS the browser has to process and speeds up your site.<\/p>\n\n\n\n One effective way to speed up your site is to inline critical CSS<\/strong>. Critical CSS includes the styles needed for rendering the above-the-fold content (the part of the page visible without scrolling). By inlining this CSS directly in the <head> section, the browser can apply these styles right away, without waiting for external CSS files to load.<\/p>\n\n\n\n Here\u2019s how you can do this:<\/p>\n\n\n\n Another way to optimize CSS delivery is to split your CSS files<\/strong> into smaller parts and load them only when needed. This is especially useful for responsive designs. For example, you could have different CSS files for different screen sizes, like:<\/p>\n\n\n\n You can load only the relevant CSS files using media queries based on the screen size:<\/p>\n\n\n\n Render-blocking JavaScript can slow down your WordPress site\u2019s load time. If scripts are loaded incorrectly, it can negatively affect user experience and SEO. There are several ways to prevent this issue. Let\u2019s look at the best methods for optimizing JavaScript delivery on your WordPress site.<\/p>\n\n\n\n Two effective attributes for preventing JavaScript from blocking page rendering are async and defer. These tell the browser how to handle JavaScript files, helping speed up the page load process.<\/p>\n\n\n\n Both async and defer allow JavaScript to load in the background while the page continues rendering, but they work differently:<\/p>\n\n\n\n async<\/strong>:<\/p>\n\n\n\n Example:<\/strong><\/p>\n\n\n\n defer<\/strong>:<\/p>\n\n\n\n Example:<\/strong><\/p>\n\n\n\n When to Use async vs. defer:<\/strong><\/p>\n\n\n\n Example:<\/strong><\/p>\n\n\n\n Just like CSS, splitting large JavaScript files into smaller ones can improve load speed. Instead of loading one large script, break it into smaller bundles that load only when needed. This reduces the initial load time and speeds up rendering.<\/p>\n\n\n\n Example of Bundling:<\/strong><\/p>\n\n\n\n WordPress plugins<\/a> are the easiest way to block render-blocking JavaScript and CSS files. The following four plugins can help reduce render-blocking resources:<\/p>\n\n\n\n Wp Rocket<\/a> is one of the best WordPress cache plugins<\/a> that helps us quickly improve our website\u2019s performance without any technical skill requirements.<\/p>\n\n\n\n It will reduce the load time of your website and provide you with high-performance websites.<\/p>\n\n\n\n You need to install and activate the WP Rocket plugin on your WordPress. It will automatically turn on the optimal settings for caching when you do so. But, it does not turn on JavaScript and CSS optimization options by default.<\/p>\n\n\n\n Follow the steps below to fix render-blocking resources JavaScript and CSS in WordPress using the WP Rocket plugin.<\/p>\n\n\n\n Note: <\/strong>While checking the boxes of the files, have an eye on your themes<\/a>, plugins, and design. It may harm your website\u2019s functionality, design, or anything else. So, be careful while following any new process.<\/p>\n\n\n\nHow to Identify Render-Blocking Resources<\/h2>\n\n\n\n
1. Using Google PageSpeed Insights<\/h3>\n\n\n\n
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![\"PageSpeed-Insights\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/PageSpeed-Insights-1.webp\")
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2. Other Tools for Identifying Render-Blocking Resources<\/h3>\n\n\n\n
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![\"PageSpeed](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/Lighthouse-Chrome-DevTools-1.webp\")
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![\"GTmetrix\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/GTmetrix.webp\")
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![\"WebPageTest\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/WebPageTest.webp\")
<\/figure>\n\n\n\nHow to Eliminate Render-Blocking Resources in WordPress (With and Without a Plugin)<\/h2>\n\n\n\n
How to Eliminate Render-Blocking CSS in WordPress Without Plugins?<\/h3>\n\n\n\n
\n
Avoid the @import Rule<\/h4>\n\n\n\n
@import url(\"styles.css\");<\/code><\/pre>\n\n\n\n<link rel=\"stylesheet\" href=\"styles.css\"><\/code><\/pre>\n\n\n\n<link rel=\"preload\" href=\"important.css\" as=\"style\"><\/code><\/pre>\n\n\n\nRemove Unused CSS<\/h4>\n\n\n\n
Inline Critical CSS<\/h4>\n\n\n\n
\n
<!DOCTYPE HTML>\n\n<html>\n\n <head>\n\n<title>Your Website Title<\/title>\n\n<meta name=\"description\" content=\"Website description\" \/>\n\n<meta http-equiv=\"content-type\" content=\"text\/html; charset=UTF-8\" \/>\n\n<!-- Inline Critical CSS -->\n\n<style>\n\n article, footer, header, main, nav {\n\n display: block;\n\n }\n\n html {\n\n font-family: sans-serif;\n\n -ms-text-size-adjust: 100%;\n\n -webkit-text-size-adjust: 100%;\n\n }\n\n<\/style>\n\n<!-- Link to the main CSS file -->\n\n<link rel=\"stylesheet\" href=\"style\/style.css\" title=\"style\">\n\n <\/head>\n\n<\/html><\/code><\/pre>\n\n\n\nSplit CSS Files for Better Loading<\/h4>\n\n\n\n
\n
<link rel=\"stylesheet\" href=\"main.css\" media=\"all\">\n\n<link rel=\"stylesheet\" href=\"small.css\" media=\"(min-width: 320px)\">\n\n<link rel=\"stylesheet\" href=\"medium.css\" media=\"(min-width: 768px)\">\n\n<link rel=\"stylesheet\" href=\"large.css\" media=\"(min-width: 1200px)\"><\/code><\/pre>\n\n\n\nHow to Eliminate Render-Blocking JavaScript in WordPress Without Plugins?<\/h3>\n\n\n\n
\n
Use async and defer Attributes<\/h4>\n\n\n\n
\n
<script async src=\"important.js\"><\/script><\/code><\/pre>\n\n\n\n\n
<script defer src=\"important-library.js\"><\/script><\/code><\/pre>\n\n\n\n\n
<!-- Async for independent scripts -->\n\n<script async src=\"tracking.js\"><\/script>\n\n<!-- Defer for dependent scripts -->\n\n<script defer src=\"jquery.js\"><\/script>\n\n<script defer src=\"custom-script.js\"><\/script><\/code><\/pre>\n\n\n\nSplit JavaScript Files for Faster Loading<\/h4>\n\n\n\n
\/\/ Main entry point\n\nimport { loadHeader } from '.\/header.js';\n\nimport { loadFooter } from '.\/footer.js';\n\n\/\/ Load only what's needed based on screen size\n\nif (window.innerWidth > 1024) {\n\n import('.\/desktop.js').then(module => {\n\nmodule.loadDesktopFeatures();\n\n });\n\n} else {\n\n import('.\/mobile.js').then(module => {\n\nmodule.loadMobileFeatures();\n\n });\n\n}<\/code><\/pre>\n\n\n\nHow to Eliminate Render-Blocking Resources with Plugins?<\/h3>\n\n\n\n
\n
Eliminate render-blocking resources with WP Rocket<\/h4>\n\n\n\n
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![\"\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/render-blocking-wp-1.webp\")
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![\"\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/render-blocking-wp-2.webp\")
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![\"\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/render-blocking-wp-3.webp\")
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Eliminate render-blocking Resources with Autoptimize<\/h4>\n\n\n\n
![\"\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/render-blocking-wp-4.webp\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/devrims.com\/blog\/wp-content\/uploads\/2022\/03\/render-blocking-wp-5.webp\")
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