{"id":12444,"date":"2025-02-27T14:45:34","date_gmt":"2025-02-27T14:45:34","guid":{"rendered":"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/"},"modified":"2025-02-27T14:45:34","modified_gmt":"2025-02-27T14:45:34","slug":"what-is-javascript-seo-6-best-practices-to-boost-rankings","status":"publish","type":"post","link":"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/","title":{"rendered":"What Is JavaScript SEO? 6 Best Practices to Boost Rankings"},"content":{"rendered":"<p>JavaScript has enabled highly interactive and dynamic websites. But it also presents a challenge: <strong>ensuring your site is crawlable, indexable, and fast.<\/strong><\/p>\n<p>That\u2019s why JavaScript SEO is essential.<\/p>\n<p>When applied correctly, these strategies can significantly boost organic search performance.<\/p>\n<p>For instance, book retailer Follet saw a remarkable recovery after fixing JavaScript issues:<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"JavaScript SEO Improvements\" alt=\"JavaScript SEO Improvements\" data-aspect-ratio=\"0.50142857142857\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/javascript-seo-improvements.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p>That\u2019s the impact of effective JavaScript SEO.<\/p>\n<p>In this guide, you\u2019ll:<\/p>\n<ul>\n<li>Get an introduction to JavaScript SEO<\/li>\n<li>Understand the challenges with using JavaScript for search<\/li>\n<li>Learn best practices to optimize your JavaScript site for organic search<\/li>\n<\/ul>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#What_Is_JavaScript_SEO\" >What Is JavaScript SEO?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Common_JavaScript_Misconceptions\" >Common JavaScript Misconceptions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Benefits_of_JavaScript_SEO\" >Benefits of JavaScript SEO<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#How_Search_Engines_Render_JavaScript\" >How Search Engines Render JavaScript<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Crawling\" >Crawling<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Rendering\" >Rendering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Indexing\" >Indexing<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#How_JavaScript_Affects_SEO\" >How JavaScript Affects SEO<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Rendering_Delays\" >Rendering Delays<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Indexing_Issues\" >Indexing Issues<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Crawl_Budget_Challenges\" >Crawl Budget Challenges<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Core_Web_Vitals_Concerns\" >Core Web Vitals Concerns<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#JavaScript_Rendering_Options\" >JavaScript Rendering Options<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Server-Side_Rendering_SSR\" >Server-Side Rendering (SSR)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Client-Side_Rendering_CSR\" >Client-Side Rendering (CSR)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Dynamic_Rendering\" >Dynamic Rendering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Which_Rendering_Approach_is_Right_for_You\" >Which Rendering Approach is Right for You?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#JavaScript_SEO_Best_Practices\" >JavaScript SEO Best Practices<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#1_Ensure_Crawlability\" >1. Ensure Crawlability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#2_Choose_the_Optimal_Rendering_Method\" >2. Choose the Optimal Rendering Method<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#3_Reduce_JavaScript_Resources\" >3. Reduce JavaScript Resources<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#4_Defer_Scripts_Blocking_Content\" >4. Defer Scripts Blocking Content<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#5_Manage_JavaScript-Generated_Content\" >5. Manage JavaScript-Generated Content<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Provide_Fallback_Content\" >Provide Fallback Content<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Optimize_JavaScript-Based_Pagination\" >Optimize JavaScript-Based Pagination<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Test_and_Verify_Rendering\" >Test and Verify Rendering<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#6_Create_Developer-Friendly_Processes\" >6. Create Developer-Friendly Processes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#JavaScript_SEO_Resources_Tools\" >JavaScript SEO Resources + Tools<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Educational_Resources\" >Educational Resources<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Understand_JavaScript_SEO_Basics\" >Understand JavaScript SEO Basics<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Rendering_on_the_Web\" >Rendering on the Web<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Diagnostic_Tools\" >Diagnostic Tools<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Screaming_Frog_Sitebulb\" >Screaming Frog &amp; Sitebulb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Semrush_Site_Audit\" >Semrush Site Audit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Google_Search_Console\" >Google Search Console<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Performance_Optimization\" >Performance Optimization<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#WebPageTest\" >WebPageTest<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#GTMetrix\" >GTMetrix<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Chrome_DevTools_Lighthouse\" >Chrome DevTools &amp; Lighthouse<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Specialized_Tools\" >Specialized Tools<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/craighordlow.com\/index.php\/2025\/02\/27\/what-is-javascript-seo-6-best-practices-to-boost-rankings\/#Find_Your_Next_JavaScript_SEO_Opportunity_Today\" >Find Your Next JavaScript SEO Opportunity Today<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_JavaScript_SEO\"><\/span>What Is JavaScript SEO?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>JavaScript SEO is the process of optimizing JavaScript websites. It ensures search engines can crawl, render, and index them.<\/p>\n<p>Aligning JavaScript websites with SEO best practices can boost organic search rankings. All without hurting the user experience.<\/p>\n<p>However, there are still uncertainties surrounding JavaScript and SEO\u2019s impact.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Common_JavaScript_Misconceptions\"><\/span>Common JavaScript Misconceptions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"table-responsive\">\n<table class=\"table table-primary table-striped table-hover\">\n<thead>\n<tr>\n<th scope=\"col\">Misconception<\/th>\n<th scope=\"col\">Reality<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td scope=\"row\" data-before=\"Misconception\">Google can handle all JavaScript perfectly.<\/td>\n<td data-before=\"Reality\">Since JavaScript is rendered in two phases, delays and errors can occur. These issues can stop Google from crawling, rendering, and indexing content, hurting rankings.<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Misconception\">JavaScript is only for large sites.<\/td>\n<td data-before=\"Reality\">JavaScript is versatile and benefits websites of varying sizes. Smaller sites can use JavaScript in interactive forms, content accordions, and navigation dropdowns<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Misconception\">JavaScript SEO is optional.<\/td>\n<td data-before=\"Reality\">JavaScript SEO is key for finding and indexing content, especially on JavaScript-heavy sites.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Benefits_of_JavaScript_SEO\"><\/span>Benefits of JavaScript SEO<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Optimizing JavaScript for SEO can offer several advantages:<\/p>\n<ul>\n<li><strong>Improved visibility:<\/strong> Crawled and indexed JavaScript content can boost search rankings<\/li>\n<li><strong>Enhanced performance:<\/strong> Techniques like code splitting deliver only the important JavaScript code. This speeds up the site and reduces load times.<\/li>\n<li><strong>Stronger collaboration:<\/strong> JavaScript SEO encourages SEOs, developers, and web teams to work together. This helps improve communication and alignment on your <a title=\"Defining an SEO Project Plan\" href=\"https:\/\/www.edwindanromero.com\/seo-project-plan\/\" target=\"_blank\" rel=\"noopener\">SEO project plan<\/a>.<\/li>\n<li><strong>Enhanced user experience:<\/strong> JavaScript boosts UX with smooth transitions and interactivity. It also speeds up and makes navigation between webpages more dynamic.<\/li>\n<\/ul>\n<div class=\"sc-quote alert blue-box font-georgia type-normal transparent-img-bg\">\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-sm-down\">\n            <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-note.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">        <\/figure>\n<div class=\"media-body\">\n<blockquote class=\"sc-quote\">\n<p><strong>Side note:<\/strong> JavaScript can impact PageSpeed and Core Web Vitals scores.<\/p>\n<\/blockquote>\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-md-up\">\n                    <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-note.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">                <\/figure>\n<p>                                <cite class=\"sc-name media-body media-middle\"><br \/>\n                                    <\/cite>\n            <\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_Search_Engines_Render_JavaScript\"><\/span>How Search Engines Render JavaScript<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To understand JavaScript\u2019s SEO impact, let\u2019s explore how search engines process JavaScript pages.<\/p>\n<p>Google has <a title=\"Understand JavaScript SEO Basics | Google Search Central | Documentation\" href=\"https:\/\/developers.google.com\/search\/docs\/crawling-indexing\/javascript\/javascript-seo-basics\" target=\"_blank\" rel=\"noopener\">outlined<\/a> that it processes JavaScript websites in three phases:<\/p>\n<ol>\n<li>Crawling<\/li>\n<li>Processing<\/li>\n<li>Indexing<\/li>\n<\/ol>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Googlebot \u2013 Crawl Render Index\" alt=\"Googlebot \u2013 Crawl Render Index\" data-aspect-ratio=\"0.71428571428571\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/googlebot-crawl-render-index.png\" loading=\"lazy\" \/><\/p><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Crawling\"><\/span>Crawling<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When Google finds a URL, it checks the <a title=\"Robots.txt and SEO: Complete Guide\" href=\"https:\/\/backlinko.com\/hub\/seo\/robots-txt\" target=\"_blank\" rel=\"noopener\">robots.txt<\/a> file and meta robots tags. This is to see if any content is blocked from being crawled or rendered.<\/p>\n<p>If a link is discoverable by Google, the URL is added to a queue for simultaneous crawling and rendering.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Rendering\"><\/span>Rendering<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For traditional HTML websites, content is immediately available from the server response.<\/p>\n<p>In JavaScript websites, Google must execute JavaScript to render and index the content. Due to resource demands, rendering is deferred until resources are available with <a title=\"The new evergreen Googlebot | Google Search Central Blog\" href=\"https:\/\/developers.google.com\/search\/blog\/2019\/05\/the-new-evergreen-googlebot\" target=\"_blank\" rel=\"noopener\">Chromium<\/a>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Indexing\"><\/span>Indexing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Once rendered, Googlebot reads the HTML, adds new links to the crawl list, and indexes the content.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_JavaScript_Affects_SEO\"><\/span>How JavaScript Affects SEO<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Despite its growing popularity, the question often arises: Is JavaScript bad for SEO?<\/p>\n<p>Let\u2019s examine aspects that can severely impact SEO if you don\u2019t optimize JavaScript for search.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Rendering_Delays\"><\/span>Rendering Delays<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For Single Page Applications (SPAs) \u2014 like Gmail or Twitter, where content updates without page refreshes \u2014 JavaScript controls the content and user experience.<\/p>\n<p>If Googlebot can\u2019t execute the JavaScript, it may show a blank page.<\/p>\n<p>This happens when Google struggles to process the JavaScript. It hurts the page\u2019s visibility and organic performance.<\/p>\n<p>To test how Google will see your SPA site if it can\u2019t execute JavaScript, use the web crawler <a title=\"Screaming Frog SEO Spider Website Crawler\" href=\"https:\/\/www.screamingfrog.co.uk\/seo-spider\/\" target=\"_blank\" rel=\"noopener\">Screaming Frog<\/a>. Configure the render settings to \u201cText Only\u201d and crawl your site.<\/p>\n<div class=\"sc-quote alert blue-box font-georgia type-normal transparent-img-bg\">\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-sm-down\">\n            <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-note.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">        <\/figure>\n<div class=\"media-body\">\n<blockquote class=\"sc-quote\">\n<p><strong>Note:<\/strong> You\u2019ll need an SEO Spider Licence to access this setting.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Screaming Frog \u2013 Crawl Config \u2013 Rendering\" alt=\"Screaming Frog \u2013 Crawl Config \u2013 Rendering\" data-aspect-ratio=\"0.56571428571429\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/screaming-frog-crawl-config-rendering.png\" loading=\"lazy\" \/><\/p><\/figure>\n<\/blockquote>\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-md-up\">\n                    <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-note.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">                <\/figure>\n<p>                                <cite class=\"sc-name media-body media-middle\"><br \/>\n                                    <\/cite>\n            <\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"sc-quote alert blue-box font-georgia type-normal transparent-img-bg\">\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-sm-down\">\n            <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-tip.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">        <\/figure>\n<div class=\"media-body\">\n<blockquote class=\"sc-quote\">\n<p><strong>Expert tip:<\/strong> Use Screaming Frog\u2019s \u201cDisable JavaScript\u201d feature. It simulates how search engines crawl your site without executing scripts. This allows you to identify missing content or rendering issues.<\/p>\n<\/blockquote>\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-md-up\">\n                    <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-tip.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">                <\/figure>\n<p>                                <cite class=\"sc-name media-body media-middle\"><br \/>\n                                    <\/cite>\n            <\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Indexing_Issues\"><\/span>Indexing Issues<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>JavaScript frameworks (like React or Angular, which help build interactive websites) can make it harder for Google to read and index content.<\/p>\n<p>For example, Follet\u2019s online bookstore migrated millions of pages to a JavaScript framework.<\/p>\n<p>Google had trouble processing the JavaScript, causing a sharp decline in organic performance:<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Impact from Rendering Issues\" alt=\"Impact from Rendering Issues\" data-aspect-ratio=\"0.51285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/impact-from-rendering-issues.png\" loading=\"lazy\" \/><\/p><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Crawl_Budget_Challenges\"><\/span>Crawl Budget Challenges<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Websites have a <a title=\"What is Crawl Budget? And Why Does It Matter for SEO?\" href=\"https:\/\/backlinko.com\/hub\/seo\/crawl-budget\" target=\"_blank\" rel=\"noopener\">crawl budget<\/a>. This refers to the number of pages Googlebot can crawl and index within a given timeframe.<\/p>\n<p>Large JavaScript files consume significant crawling resources. They also limit Google\u2019s ability to explore deeper pages on the site.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Core_Web_Vitals_Concerns\"><\/span>Core Web Vitals Concerns<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>JavaScript can affect how quickly the main content of a web page is loaded. This affects <a title=\"Optimize Largest Contentful Paint | Articles | web.dev\" href=\"https:\/\/web.dev\/articles\/optimize-lcp#:~:text=The%20reason%20this%20happens%20is%20because%2C%20on%20this%20page%2C%20the%20LCP%20element%20is%20hidden%20until%20the%20JavaScript%20code%20finishes%20loading%2C%20and%20then%20everything%20is%20revealed%20at%20once.\" target=\"_blank\" rel=\"noopener\">Largest Contentful Paint (LCP)<\/a>, a Core Web Vitals score.<\/p>\n<p>For example, check out this performance timeline:<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"LCP Breakdown \u2013 Render Delay\" alt=\"LCP Breakdown \u2013 Render Delay\" data-aspect-ratio=\"0.56285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/lcp-breakdown-render-delay.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p>Section #4 (\u201cElement Render Delay\u201d) shows a JavaScript-induced delay in rendering an element.<\/p>\n<p>This negatively impacts the LCP score.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"JavaScript_Rendering_Options\"><\/span>JavaScript Rendering Options<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When rendering webpages, you can choose from three options:<\/p>\n<p>Server-Side Rendering (SSR), Client-Side Rendering (CSR), or Dynamic Rendering.<\/p>\n<p>Let\u2019s break down the key differences between them.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Server-Side_Rendering_SSR\"><\/span>Server-Side Rendering (SSR)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>SSR creates the full HTML on the server. It then sends this HTML directly to the client, like a browser or Googlebot.<\/p>\n<figure class=\"backlinko-image__visual-chart backlinko-image\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Server Side Rendering Process\" alt=\"Server Side Rendering Process\" data-aspect-ratio=\"0.59714285714286\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/server-side-rendering-process.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p>This approach means the client doesn\u2019t need to render the content.<\/p>\n<p>As a result, the website loads faster and offers a smoother experience.<\/p>\n<div class=\"table-responsive\">\n<table class=\"table table-primary table-striped table-hover\">\n<thead>\n<tr>\n<th scope=\"col\">Benefits of SSR<\/th>\n<th scope=\"col\">Drawbacks of SSR<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of SSR\">Improved performance<\/td>\n<td data-before=\"Drawbacks of SSR\">Higher server load<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of SSR\">Search engine optimization<\/td>\n<td data-before=\"Drawbacks of SSR\">Longer time to interactivity<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of SSR\">Enhanced accessibility<\/td>\n<td data-before=\"Drawbacks of SSR\">Complex implementation<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of SSR\">Consistent experience<\/td>\n<td data-before=\"Drawbacks of SSR\">Limited caching<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Client-Side_Rendering_CSR\"><\/span>Client-Side Rendering (CSR)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In CSR, the client\u2014like a user, browser, or Googlebot\u2014receives a blank HTML page. Then, JavaScript runs to generate the fully rendered HTML.<\/p>\n<figure class=\"backlinko-image__visual-chart backlinko-image\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Client Side Rendering Process\" alt=\"Client Side Rendering Process\" data-aspect-ratio=\"0.59714285714286\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/client-side-rendering-process.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p>Google can render client-side, JavaScript-driven pages. But, it may delay rendering and indexing.<\/p>\n<div class=\"table-responsive\">\n<table class=\"table table-primary table-striped table-hover\">\n<thead>\n<tr>\n<th scope=\"col\">Benefits of CSR<\/th>\n<th scope=\"col\">Drawbacks of CSR<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of CSR\">Reduced server load<\/td>\n<td data-before=\"Drawbacks of CSR\">Slower initial load times<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of CSR\">Enhanced interactivity<\/td>\n<td data-before=\"Drawbacks of CSR\">SEO challenges<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of CSR\">Improved scalability<\/td>\n<td data-before=\"Drawbacks of CSR\">Increased complexity<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of CSR\">Faster page transitions<\/td>\n<td data-before=\"Drawbacks of CSR\">Performance variability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Dynamic_Rendering\"><\/span>Dynamic Rendering<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Dynamic rendering, or prerendering, is a hybrid approach.<\/p>\n<p>Tools like Prerender.io detect Googlebot and other crawlers. They then send a fully rendered webpage from a cache.<\/p>\n<figure class=\"backlinko-image__visual-chart backlinko-image\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Dynamic Rendering Process\" alt=\"Dynamic Rendering Process\" data-aspect-ratio=\"0.83428571428571\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/dynamic-rendering-process.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p>This way, search engines don\u2019t need to run JavaScript.<\/p>\n<p>At the same time, regular users still get a CSR experience. JavaScript is executed and content is rendered on the client side.<\/p>\n<p>Google says dynamic rendering isn\u2019t cloaking. The content shown to Googlebot just needs to be the same as what users see.<\/p>\n<p>However, it warns that dynamic rendering is a temporary solution. This is due to its complexity and resource needs.<\/p>\n<div class=\"table-responsive\">\n<table class=\"table table-primary table-striped table-hover\">\n<thead>\n<tr>\n<th scope=\"col\">Benefits of Dynamic Rendering<\/th>\n<th scope=\"col\">Drawbacks of Dynamic Rendering<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of Dynamic Rendering\">Better SEO<\/td>\n<td data-before=\"Drawbacks of Dynamic Rendering\">Complex setup<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of Dynamic Rendering\">Crawler compatibility<\/td>\n<td data-before=\"Drawbacks of Dynamic Rendering\">Risk of cloaking<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of Dynamic Rendering\">Optimized UX<\/td>\n<td data-before=\"Drawbacks of Dynamic Rendering\">Tool dependency<\/td>\n<\/tr>\n<tr>\n<td scope=\"row\" data-before=\"Benefits of Dynamic Rendering\">Scalable for large sites<\/td>\n<td data-before=\"Drawbacks of Dynamic Rendering\">Performance latency<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Which_Rendering_Approach_is_Right_for_You\"><\/span>Which Rendering Approach is Right for You?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The right rendering approach depends on several factors.<\/p>\n<p>Here are key considerations to help you determine the best solution for your website:<\/p>\n<div class=\"table-responsive\">\n<table class=\"table table-primary table-striped table-hover\">\n<thead>\n<tr>\n<th scope=\"col\">Rendering Option<\/th>\n<th scope=\"col\">Best for<\/th>\n<th scope=\"col\">When to Choose<\/th>\n<th scope=\"col\">Requirements<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"strong\" scope=\"row\" data-before=\"Rendering Option\">Server-Side Rendering (SSR)<\/td>\n<td data-before=\"Best for\">SEO-critical sites (e.g., ecommerce, blogs)\n<p>Sites relying on organic traffic<\/p>\n<p>Faster Core Web Vitals (e.g., LCP)<\/p>\n<\/td>\n<td data-before=\"When to Choose\">Need timely indexing and visibility\n<p>Users expect fast, fully-rendered pages upon load<\/p>\n<\/td>\n<td data-before=\"Requirements\">Strong server infrastructure to handle higher load\n<p>Expertise in SSR frameworks (e.g., Next.js, Nuxt.js)<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"strong\" scope=\"row\" data-before=\"Rendering Option\">Client-Side Rendering (CSR)<\/td>\n<td data-before=\"Best for\">Highly dynamic user interfaces (e.g., dashboards, web apps)\n<p>Content not dependent on organic traffic (e.g. behind login)<\/p>\n<\/td>\n<td data-before=\"When to Choose\">SEO is not a top priority\n<p>Focus on reducing server load and scaling for large audiences<\/p>\n<\/td>\n<td data-before=\"Requirements\">JavaScript optimization to address performance issues\n<p>Ensuring crawlability with fallback content<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"strong\" scope=\"row\" data-before=\"Rendering Option\">Dynamic Rendering<\/td>\n<td data-before=\"Best for\">JavaScript-heavy sites needing search engine access\n<p>Large-scale, dynamic content websites<\/p>\n<\/td>\n<td data-before=\"When to Choose\">SSR is resource-intensive for the entire site\n<p>Need to balance bot crawling with user-focused interactivity<\/p>\n<\/td>\n<td data-before=\"Requirements\">Pre-rendering tool like Prerender.io\n<p>Bot detection and routing configuration<\/p>\n<p>Regular audits to avoid cloaking risks<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Knowing these technical solutions is important. But the best approach depends on how your website uses JavaScript.<\/p>\n<p>Where does your site fit?<\/p>\n<ul>\n<li><strong>Minimal JavaScript:<\/strong> Most content is in the HTML (e.g., WordPress sites). Just make sure search engines can see key text and links.<\/li>\n<li><strong>Moderate JavaScript:<\/strong> Some elements load dynamically, like live chat, AJAX-based widgets, or interactive product filters. Use fallbacks or dynamic rendering to keep content crawlable.<\/li>\n<li><strong>Heavy JavaScript:<\/strong> Your site depends on JavaScript to load most content, like SPAs built with React or Vue. To make sure Google can see it, you may need SSR or pre-rendering.<\/li>\n<li><strong>Fully JavaScript-rendered:<\/strong> Everything from content to navigation relies on JavaScript (e.g., Next.js, Gatsby). You\u2019ll need SSR or Static Site Generation (SSG), optimized hydration, and proper metadata handling to stay SEO-friendly.<\/li>\n<\/ul>\n<p>The more JavaScript your site relies on, the more important it is to optimize for SEO.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"JavaScript_SEO_Best_Practices\"><\/span>JavaScript SEO Best Practices<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>So, your site looks great to users\u2014but what about Google?<\/p>\n<p>If search engines can\u2019t properly crawl or render your JavaScript, your rankings could take a hit.<\/p>\n<p>The good news? You can fix it.<\/p>\n<p>Here\u2019s how to make sure your JavaScript-powered site is fully optimized for search.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Ensure_Crawlability\"><\/span>1. Ensure Crawlability<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Avoid blocking JavaScript files in the robots.txt file to ensure Google can crawl them.<\/p>\n<p>In the past, HTML-based websites often blocked JavaScript and CSS.<\/p>\n<p>Now, crawling JavaScript files is crucial for accessing and rendering key content.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Choose_the_Optimal_Rendering_Method\"><\/span>2. Choose the Optimal Rendering Method<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It\u2019s crucial to choose the right approach based on your site\u2019s needs.<\/p>\n<p>This decision may depend on your resources, user goals, and vision for your website. Remember:<\/p>\n<ul>\n<li>Server-side rendering: Ensures content is fully rendered and indexable upon page load. This improves visibility and user experience.<\/li>\n<li>Client-side rendering: Renders content on the client side, offering better interactivity for users<\/li>\n<li>Dynamic rendering: Sends crawlers pre-rendered HTML and users a CSR experience<\/li>\n<\/ul>\n<figure class=\"backlinko-image__visual-chart backlinko-image\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Rendering Options\" alt=\"Rendering Options\" data-aspect-ratio=\"0.92428571428571\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/rendering-options.png\" loading=\"lazy\" \/><\/p><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"3_Reduce_JavaScript_Resources\"><\/span>3. Reduce JavaScript Resources<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Reduce JavaScript size by removing unused or unnecessary code. Even unused code must be accessed and processed by Google.<\/p>\n<p>Combine multiple JavaScript files to reduce the resources Googlebot needs to execute. This helps improve efficiency.<\/p>\n<div class=\"sc-quote alert blue-box font-georgia type-normal transparent-img-bg\">\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-sm-down\">\n            <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-tip.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">        <\/figure>\n<div class=\"media-body\">\n<blockquote class=\"sc-quote\">\n<p><strong>Pro tip:<\/strong> Use <a title=\"PageSpeed Insights\" href=\"https:\/\/pagespeed.web.dev\/\" target=\"_blank\" rel=\"noopener\">PageSpeed Insights<\/a> to find JavaScript issues, like render-blocking scripts. Follow its suggestions, such as deferring non-critical scripts or minifying code.<\/p>\n<\/blockquote>\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-md-up\">\n                    <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-tip.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">                <\/figure>\n<p>                                <cite class=\"sc-name media-body media-middle\"><br \/>\n                                    <\/cite>\n            <\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"4_Defer_Scripts_Blocking_Content\"><\/span>4. Defer Scripts Blocking Content<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can defer render-blocking JavaScript to speed up page loading.<\/p>\n<p>Use the \u201cdefer\u201d attribute to do this, as shown below:<\/p>\n<pre>&lt;script defer src=\"your-script.js\"&gt;&lt;\/script&gt;<\/pre>\n<p>This tells browsers and search engines to run the code once the main CSS and JavaScript have loaded.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Manage_JavaScript-Generated_Content\"><\/span>5. Manage JavaScript-Generated Content<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Managing JavaScript content is key. It must be accessible to search engines and provide a smooth user experience.<\/p>\n<p>Here are some best practices to optimize it for SEO:<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Provide_Fallback_Content\"><\/span>Provide Fallback Content<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Use the &lt;noscript&gt; tag to show essential info if JavaScript fails or is disabled<\/li>\n<li>Ensure critical content like navigation and headings is included in the initial HTML<\/li>\n<\/ul>\n<p>For example, Yahoo uses a &lt;noscript&gt; tag. It shows static product details for JavaScript-heavy pages.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Yahoo \u2013 Noscript tag\" alt=\"Yahoo \u2013 Noscript tag\" data-aspect-ratio=\"0.19285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/yahoo-noscript-tag.png\" loading=\"lazy\" \/><\/p><\/figure>\n<h4><span class=\"ez-toc-section\" id=\"Optimize_JavaScript-Based_Pagination\"><\/span>Optimize JavaScript-Based Pagination<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Use HTML &lt;a&gt; tags for pagination to ensure Googlebot can crawl each page<\/li>\n<li>Dynamically update URLs with the History API for \u201cLoad More\u201d buttons<\/li>\n<li>Add rel=\u201dprev\u201d and rel=\u201dnext\u201d to indicate paginated page relationships<\/li>\n<\/ul>\n<p>For instance, Skechers employs a \u201cLoad More\u201d button that generates accessible URLs:<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Sketchers \u2013 Load More\" alt=\"Sketchers \u2013 Load More\" data-aspect-ratio=\"0.69285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/sketchers-load-more.png\" loading=\"lazy\" \/><\/p><\/figure>\n<h4><span class=\"ez-toc-section\" id=\"Test_and_Verify_Rendering\"><\/span>Test and Verify Rendering<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Use Google Search Console\u2019s (GSC) URL Inspection Tool and Screaming Frog to check JavaScript content. Is it accessible?<\/li>\n<li>Test JavaScript execution using browser automation tools like Puppeteer to ensure proper rendering<\/li>\n<\/ul>\n<p>Confirm Dynamic Content Loads Correctly<\/p>\n<ul>\n<li>Use loading=\u201dlazy\u201d for <a title=\"Image SEO: 15 Tips for Image Optimization\" href=\"https:\/\/backlinko.com\/image-seo#:~:text=12.%20Use%20lazy%20loading\" target=\"_blank\" rel=\"noopener\">lazy-loaded elements<\/a> and verify they appear in rendered HTML<\/li>\n<li>Provide fallback content for dynamically loaded elements to ensure visibility to crawlers<\/li>\n<\/ul>\n<p>For example, Backlinko lazy loads images within HTML:<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Image loading \u2013 Lazy\" alt=\"Image loading \u2013 Lazy\" data-aspect-ratio=\"0.92285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/image-loading-lazy.png\" loading=\"lazy\" \/><\/p><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"6_Create_Developer-Friendly_Processes\"><\/span>6. Create Developer-Friendly Processes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Working closely with developers is key to integrating JavaScript and SEO best practices.<\/p>\n<p>Here\u2019s how you can streamline the process:<\/p>\n<ol>\n<li><strong>Spot the issues:<\/strong> Use tools like Screaming Frog or Chrome DevTools. They can find JavaScript rendering issues. Document these early.<\/li>\n<li><strong>Write actionable tickets:<\/strong> Write clear SEO dev tickets with the issue, its SEO impact, and step-by-step instructions to fix it. For example, here\u2019s a <a title=\"Writing an Effective SEO Development Ticket - Edwin Romero\" href=\"https:\/\/www.edwindanromero.com\/writing-an-effective-seo-development-ticket\/\" target=\"_blank\" rel=\"noopener\">sample dev ticket<\/a>:<br \/>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Sample \u2013 Dev Ticket\" alt=\"Sample \u2013 Dev Ticket\" data-aspect-ratio=\"0.88857142857143\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/sample-dev-ticket.png\" loading=\"lazy\" \/><\/p><\/figure>\n<\/li>\n<li><strong>Test and validate fixes:<\/strong> Conduct quality assurance (QA) to ensure fixes are implemented correctly. Share updates and results with your team to maintain alignment.<\/li>\n<li><strong>Collaborate in real time:<\/strong> Use <a title=\"9 Best SEO Software Tools Trusted by 7-Figure Agencies\" href=\"https:\/\/backlinko.com\/seo-software-agencies#notion\" target=\"_blank\" rel=\"noopener\">project management tools<\/a> like Notion, Jira, or Trello. These help ensure smooth communication between SEOs and developers.<\/li>\n<\/ol>\n<p>By building developer-friendly processes, you can solve JavaScript SEO issues faster. This also creates a collaborative environment that helps the whole team.<\/p>\n<p>Communicating SEO best practices for JavaScript usage is as crucial as its implementation.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"JavaScript_SEO_Resources_Tools\"><\/span>JavaScript SEO Resources + Tools<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>As you learn how to make your javascript SEO friendly\u200b, several tools can assist you in the process.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Educational_Resources\"><\/span>Educational Resources<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Google has provided or contributed to some great resources:<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Understand_JavaScript_SEO_Basics\"><\/span>Understand JavaScript SEO Basics<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Google\u2019s <a title=\"Understand JavaScript SEO Basics | Google Search Central | Documentation\" href=\"https:\/\/developers.google.com\/search\/docs\/crawling-indexing\/javascript\/javascript-seo-basics\" target=\"_blank\" rel=\"noopener\">JavaScript basics<\/a> documentation explains how it processes JavaScript content.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Google JavaScript \u2013 Basics\" alt=\"Google JavaScript \u2013 Basics\" data-aspect-ratio=\"0.55857142857143\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/google-javascript-basics.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>What you\u2019ll learn:<\/strong><\/p>\n<ul>\n<li>How Google processes JavaScript content, including crawling, rendering, and indexing<\/li>\n<li>Best practices for ensuring JavaScript-based websites are fully optimized for search engines<\/li>\n<li>Common pitfalls to avoid and strategies to improve SEO performance on JavaScript-driven websites<\/li>\n<\/ul>\n<p><strong>Who it\u2019s for:<\/strong> Developers and SEO professionals optimizing JavaScript-heavy sites.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Rendering_on_the_Web\"><\/span>Rendering on the Web<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>The web.dev article <a title=\"Rendering on the Web | Articles\" href=\"https:\/\/web.dev\/articles\/rendering-on-the-web\" target=\"_blank\" rel=\"noopener\">Rendering on the Web<\/a> is a comprehensive resource. It explores various web rendering techniques, including SSR, CSR, and prerendering.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Webdev \u2013 Rendering on Web\" alt=\"Webdev \u2013 Rendering on Web\" data-aspect-ratio=\"0.73285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/webdev-rendering-on-web.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>What you\u2019ll learn:<\/strong><\/p>\n<ul>\n<li>An in-depth overview of web rendering techniques<\/li>\n<li>Performance implications of each rendering method. And how they affect user experience and SEO.<\/li>\n<li>Actionable insights for choosing the right rendering strategy based on your goals<\/li>\n<\/ul>\n<p><strong>Who it\u2019s for:<\/strong> Marketers, developers, and SEOs wanting to boost performance and visibility.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Diagnostic_Tools\"><\/span>Diagnostic Tools<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Screaming_Frog_Sitebulb\"><\/span>Screaming Frog &amp; Sitebulb<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Crawlers such as <a title=\"Screaming Frog SEO Spider Website Crawler\" href=\"https:\/\/www.screamingfrog.co.uk\/seo-spider\/\" target=\"_blank\" rel=\"noopener\">Screaming Frog<\/a> or <a title=\"Sitebulb\" href=\"https:\/\/sitebulb.com\/\" target=\"_blank\" rel=\"noopener\">Sitebulb<\/a> help identify issues affecting JavaScript.<\/p>\n<p>How? By simulating how search engines process your site.<\/p>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li><strong>Crawl JavaScript websites:<\/strong> Detect blocked or inaccessible JavaScript files using robots.txt configurations<\/li>\n<li><strong>Render simulation:<\/strong> Crawl and visualize how JavaScript-rendered pages appear to search engines<\/li>\n<li><strong>Debugging capabilities:<\/strong> Identify rendering issues, missing content, or broken resources preventing proper indexing<\/li>\n<\/ul>\n<p><strong>Example use case:<\/strong><\/p>\n<ul>\n<li>Use Screaming Frog\u2019s robots.txt settings to emulate Googlebot. The tool can confirm if critical JavaScript files are accessible.<\/li>\n<\/ul>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Screaming Frog \u2013 Robots Settings\" alt=\"Screaming Frog \u2013 Robots Settings\" data-aspect-ratio=\"0.70857142857143\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/screaming-frog-robots-settings.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>When to use:<\/strong><\/p>\n<ul>\n<li>Debugging JavaScript-related indexing problems<\/li>\n<li>Testing rendering issues with pre-rendered or dynamic content<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Semrush_Site_Audit\"><\/span>Semrush Site Audit<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Semrush\u2019s <a title=\"Site Audit: Improve the SEO of Your Website | Semrush\" href=\"https:\/\/www.semrush.com\/siteaudit\/\" target=\"_blank\" rel=\"noopener\">Site Audit<\/a> is a powerful tool for diagnosing JavaScript SEO issues.<\/p>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li><strong>Crawlability checks:<\/strong> Identifies JavaScript files that hinder rendering and indexing<\/li>\n<li><strong>Rendering insights:<\/strong> Detects JavaScript-related errors impacting search engines\u2019 ability to process content<\/li>\n<li><strong>Performance metrics:<\/strong> Highlights Core Web Vitals like LCP and Total Blocking Time (TBT)<\/li>\n<li><strong>Actionable fixes:<\/strong> Provides recommendations to optimize JavaScript code, improve speed, and fix rendering issues<\/li>\n<\/ul>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Site Audit \u2013  Backlinko \u2013 Overview\" alt=\"Site Audit \u2013 Backlinko \u2013 Overview\" data-aspect-ratio=\"0.89285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/01\/site-audit-backlinko-overview.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p>Site Audit also includes a \u201cJS Impact\u201d report, which focuses on uncovering JavaScript-related issues.<\/p>\n<p>It highlights blocked files, rendering errors, and performance bottlenecks. The report provides actionable insights to enhance SEO.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Site Audit \u2013 Backlinko \u2013 JS Impact\" alt=\"Site Audit \u2013 Backlinko \u2013 JS Impact\" data-aspect-ratio=\"0.49285714285714\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/site-audit-backlinko-js-impact.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>When to use:<\/strong><\/p>\n<ul>\n<li>Identify rendering blocking issues caused by JavaScript<\/li>\n<li>Troubleshoot performance issues after implementing large JavaScript implementations<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Google_Search_Console\"><\/span>Google Search Console<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a title=\"Google Search Console: The Definitive Guide\" href=\"https:\/\/backlinko.com\/google-search-console#:~:text=Get%20The%20Most%20Out%20of%20%E2%80%9CURL%20Inspection%E2%80%9D\" target=\"_blank\" rel=\"noopener\">Google Search Console\u2019s<\/a> Inspection Tool helps analyze your JavaScript pages. It checks how Google crawls, renders, and indexes them.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"GSC \u2013 URL Inspection \u2013 JS Console Messages\" alt=\"GSC \u2013 URL Inspection \u2013 JS Console Messages\" data-aspect-ratio=\"0.78857142857143\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/gsc-url-inspection-js-console-messages.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li><strong>Rendering verification:<\/strong> Check if Googlebot successfully executes and renders JavaScript content<\/li>\n<li><strong>Crawlability insights:<\/strong> Identify blocked resources or missing elements impacting indexing<\/li>\n<li><strong>Live testing:<\/strong> Use live tests to ensure real-time changes are visible to Google<\/li>\n<\/ul>\n<p><strong>Example use case:<\/strong><\/p>\n<ul>\n<li>Inspecting a JavaScript-rendered page to see if all critical content is in the rendered HTML<\/li>\n<\/ul>\n<p><strong>When to use:<\/strong><\/p>\n<ul>\n<li>Verifying JavaScript rendering and indexing<\/li>\n<li>Troubleshooting blank or incomplete content in Google\u2019s search results<\/li>\n<\/ul>\n<div class=\"sc-quote alert blue-box font-georgia type-normal transparent-img-bg\">\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-sm-down\">\n            <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-tip.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">        <\/figure>\n<div class=\"media-body\">\n<blockquote class=\"sc-quote\">\n<p><strong>Pro tip:<\/strong> Use GSC\u2019s \u201cCoverage Report.\u201d It can find resources blocked by robots.txt or delayed by heavy JavaScript. Regularly reviewing this report helps maintain optimal crawlability.<\/p>\n<\/blockquote>\n<div class=\"media\">\n<figure class=\"sc-picture media-left hidden-md-up\">\n                    <img decoding=\"async\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/06\/icon-tip.png\" alt=\"| Craig Hordlow\" loading=\"lazy\" title=\"| Craig Hordlow\">                <\/figure>\n<p>                                <cite class=\"sc-name media-body media-middle\"><br \/>\n                                    <\/cite>\n            <\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Performance_Optimization\"><\/span>Performance Optimization<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You may need to test your JavaScript website\u2019s performance. These tools granularly break down performance:<\/p>\n<h4><span class=\"ez-toc-section\" id=\"WebPageTest\"><\/span>WebPageTest<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a title=\"WebPageTest\" href=\"https:\/\/www.webpagetest.org\/\" target=\"_blank\" rel=\"noopener\">WebPageTest<\/a> helps analyze website performance, including how JavaScript affects load times and rendering.<\/p>\n<p>The screenshot below shows high-level performance metrics for a JavaScript site. It includes when the webpage was visible to users.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Webpagetest \u2013 Page Performance Metrics\" alt=\"Webpagetest \u2013 Page Performance Metrics\" data-aspect-ratio=\"0.44571428571429\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/webpagetest-page-performance-metrics.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li>Provides waterfall charts to visualize the loading sequence of JavaScript and other resources<\/li>\n<li>Measures critical performance metrics like Time to First Byte (TTFB) and LCP<\/li>\n<li>Simulates slow networks and mobile devices to identify JavaScript bottlenecks<\/li>\n<\/ul>\n<p><strong>Use case:<\/strong> Finding scripts or elements that slow down page load and affect Core Web Vitals.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"GTMetrix\"><\/span>GTMetrix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a title=\"GTmetrix\" href=\"https:\/\/gtmetrix.com\/\" target=\"_blank\" rel=\"noopener\">GTmetrix<\/a> helps measure and optimize website performance, focusing on JavaScript-related delays and efficiency.<\/p>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li>Breaks down page performance with actionable insights for JavaScript optimization<\/li>\n<li>Provides specific recommendations to minimize and defer non-critical JavaScript<\/li>\n<li>Visualizes load behavior with video playback and waterfall charts to pinpoint render delays<\/li>\n<\/ul>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"GTmetrix \u2013 Waterfall \u2013 Images \u2013 Report\" alt=\"GTmetrix \u2013 Waterfall \u2013 Images \u2013 Report\" data-aspect-ratio=\"0.62\" src=\"https:\/\/backlinko.com\/app\/uploads\/2024\/09\/gtmetrix-waterfall-images-report.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>Use case:<\/strong> Optimizing JavaScript delivery to boost page speed and user experience. This includes minifying, deferring, or splitting code.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Chrome_DevTools_Lighthouse\"><\/span>Chrome DevTools &amp; Lighthouse<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a title=\"Chrome DevTools\" href=\"https:\/\/developer.chrome.com\/docs\/devtools\" target=\"_blank\" rel=\"noopener\">Chrome DevTools<\/a> and Lighthouse are free Chrome tools. They assess site performance and accessibility. Both are key for JavaScript SEO.<\/p>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li><strong>JavaScript execution analysis:<\/strong> Audits JavaScript execution time. It also identifies scripts that delay rendering or impact Core Web Vitals.<\/li>\n<li><strong>Script optimization:<\/strong> Flags opportunities for code splitting, lazy loading, and removing unused JavaScript<\/li>\n<li><strong>Network and coverage insights:<\/strong> Identifies render-blocking resources, unused JavaScript, and large file sizes<\/li>\n<li><strong>Performance audits:<\/strong> Lighthouse measures critical Core Web Vitals to pinpoint areas for improvement<\/li>\n<li><strong>Render simulation:<\/strong> It emulates devices, throttles network speeds, and disables JavaScript. This alleviates rendering issues.<\/li>\n<\/ul>\n<p>For example, the below screenshot is taken with DevTools\u2019s <a title=\"Analyze runtime performance | Chrome DevTools\" href=\"https:\/\/developer.chrome.com\/docs\/devtools\/performance\" target=\"_blank\" rel=\"noopener\">Performance<\/a> panel. After page load, various pieces of data are recorded to assess the culprit of heavy load times.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"Chrome \u2013 Performance report\" alt=\"Chrome \u2013 Performance report\" data-aspect-ratio=\"0.53857142857143\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/chrome-performance-report.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>Use cases:<\/strong><\/p>\n<ul>\n<li>Testing JavaScript-heavy pages for performance bottlenecks, rendering issues, and SEO blockers<\/li>\n<li>Identifying and optimizing scripts, ensuring key content is crawlable and indexable<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Specialized_Tools\"><\/span>Specialized Tools<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a title=\"Prerender.io\" href=\"http:\/\/prerender.io\/\" target=\"_blank\" rel=\"noopener\">Prerender.io<\/a> helps JavaScript-heavy websites by serving pre-rendered HTML to bots.<\/p>\n<p>This allows search engines to crawl and index content while users get a dynamic CSR experience.<\/p>\n<figure class=\"backlinko-image__screenshot backlinko-image backlinko-has-border\">\n<div class=\"backlinko-img-placeholder\"><\/div>\n<p><img decoding=\"async\" title=\"PreRender \u2013 Cache Manager\" alt=\"PreRender \u2013 Cache Manager\" data-aspect-ratio=\"0.67428571428571\" src=\"https:\/\/backlinko.com\/app\/uploads\/2025\/02\/prerender-cache-manager.png\" loading=\"lazy\" \/><\/p><\/figure>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li><strong>Pre-rendered content:<\/strong> Serves a cached, fully rendered HTML page to search engine crawlers like Googlebot<\/li>\n<li><strong>Easy integration:<\/strong> Compatible with frameworks like React, Vue, and Angular. It also integrates with servers like NGINX or Apache.<\/li>\n<li><strong>Scalable solution:<\/strong> Ideal for large, dynamic sites with thousands of pages<\/li>\n<li><strong>Bot detection:<\/strong> Identifies search engine bots and serves optimized content<\/li>\n<li><strong>Performance optimization:<\/strong> Reduces server load by offloading rendering to Prerender.io\u2019s service<\/li>\n<\/ul>\n<p><strong>Benefits:<\/strong><\/p>\n<ul>\n<li>Ensures full crawlability and indexing of JavaScript content<\/li>\n<li>Improves search engine rankings by eliminating blank or incomplete pages<\/li>\n<li>Balances SEO performance and user experience for JavaScript-heavy sites<\/li>\n<\/ul>\n<p><strong>When to use:<\/strong><\/p>\n<ul>\n<li>For Single-Page Applications or dynamic JavaScript frameworks<\/li>\n<li>As an alternative to SSR when resources are limited<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Find_Your_Next_JavaScript_SEO_Opportunity_Today\"><\/span>Find Your Next JavaScript SEO Opportunity Today<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Most JavaScript SEO problems stay hidden\u2014until your rankings drop.<\/p>\n<p>Is your site at risk?<\/p>\n<p>Don\u2019t wait for traffic losses to find out.<\/p>\n<p>Run an audit, fix rendering issues, and make sure search engines see your content.<\/p>\n<p>Want more practical fixes?<\/p>\n<p>Check out our guides on <a title=\"Page Speed and SEO: The Complete Guide\" href=\"https:\/\/backlinko.com\/hub\/seo\/pagespeed\" target=\"_blank\" rel=\"noopener\">PageSpeed<\/a> and <a title=\"Core Web Vitals: Essential Guide to Better Site Performance\" href=\"https:\/\/backlinko.com\/hub\/seo\/core-web-vitals\" target=\"_blank\" rel=\"noopener\">Core Web Vitals<\/a> for actionable steps to speed up your JavaScript-powered site.<\/p>\n<p>The post <a href=\"https:\/\/backlinko.com\/javascript-seo\" target=\"_blank\" rel=\"noopener\">What Is JavaScript SEO? 6 Best Practices to Boost Rankings<\/a> appeared first on <a href=\"https:\/\/backlinko.com\/\" target=\"_blank\" rel=\"noopener\">Backlinko<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>JavaScript has enabled highly interactive and dynamic websites. But it also presents a challenge: ensuring your site is crawlable, indexable, and fast. That\u2019s why JavaScript SEO is essential. When applied correctly, these strategies can significantly boost organic search performance. For instance, book retailer Follet saw a remarkable recovery after fixing JavaScript issues: That\u2019s the impact of effective JavaScript SEO. In this guide, you\u2019ll: Get an introduction to JavaScript SEO Understand the challenges with using JavaScript for search Learn best practices to optimize your JavaScript site for [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12445,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"h5ap_radio_sources":[],"cybocfi_hide_featured_image":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-12444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-backlinko"],"featured_image_src":"https:\/\/craighordlow.com\/wp-content\/uploads\/2025\/02\/javascript-seo-improvements-WLouBD-600x400.png","featured_image_src_square":"https:\/\/craighordlow.com\/wp-content\/uploads\/2025\/02\/javascript-seo-improvements-WLouBD-600x600.png","author_info":{"display_name":false,"author_link":"https:\/\/craighordlow.com\/author\/craig\/"},"_links":{"self":[{"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/posts\/12444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/comments?post=12444"}],"version-history":[{"count":0,"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/posts\/12444\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/media\/12445"}],"wp:attachment":[{"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/media?parent=12444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/categories?post=12444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/craighordlow.com\/index.php\/wp-json\/wp\/v2\/tags?post=12444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}