JavaScript SEO

Specialized SEO service for improving the visibility of JavaScript websites.

Many websites use JavaScript frameworks like React, Vue.js, or Angular. Despite their advanced functionality, these websites may not be easily indexed by search engines, which leads to lower rankings. With JavaScript SEO, you can eliminate the obstacles that make building visibility and reaching customers difficult.

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JavaScript SEO

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We Will Solve the Problems With the Visibility of Your JavaScript Website

JavaScript is one of the most popular programming languages and a powerful tool in creating modern websites. However, without proper optimization, it can prevent your site from increasing its visibility on Google.

Rendering and Indexing Optimization

Rendering is the process of transforming a website’s code (e.g., HTML, CSS, JavaScript) into what you see on the screen. Thanks to indexing, search engines can quickly find and display relevant results. Current JavaScript frameworks (such as React, Angular, Vue, NextJS, and Svelte) have solutions that are supposed to be SEO-friendly. Therefore, we first make sure that this is the case. If something’s off, we solve the problems through optimization and using the internal mechanisms of the frameworks.

Implementation of SSR

The implementation of SSR (Server Side Rendering) can significantly improve the indexability of your website and increase its loading speed. SRR generates the entire HTML code of a page on the server before sending it to the browser. In contrast to CSR (Client-Side Rendering), where the browser fetches minimal HTML and renders the page using JavaScript, SSR generates the complete page on the server, which the browser can read and display immediately.

Optimizing a JavaScript Website

Even if we implement SSR, optimizing the website is still worthwhile. Most well-designed JS frameworks (the most popular are Vue, React, and Angular) use so-called hydration, which synchronizes the code generated on the server and makes it interactive again on the user’s side. Hydration, which is like a bridge between SSR and CSR, is an element that is often problematic in practice, e.g., slowing down the INP parameter from Core Web Vitals.

Our client, a Polish technology company with a global reach, creates digital products and solutions. Read about the challenges of this collaboration and the SEO actions that lead to outstanding results.

JS SEO Implementation

The Impact of JavaScript on SEO

Although Google officially deals with the interpretation of JavaScript, practice shows that it's almost always fraught with minor or major problems. This is where SSR comes in.

Server-side rendering solves rendering problems that arise from using a dynamic approach alone. JavaScript can affect page load time, which is an SEO ranking factor. Google processes JavaScript by scanning, rendering, and indexing. The search engine may need more time to render JavaScript sites and fully index them. JavaScript-based websites often use dynamic content that can change without reloading the entire page. Problems arise, for example, when the content is not rendered (converting the code into a view on the screen). Incorrectly created or implemented dynamic URLs also cause indexing problems.

Optimization Time

JavaScript SEO Optimization: How Long Does It Take?

Usually, code and rendering analysis of JavaScript is much more time-consuming than in the classic approach, where the code is the same in the source of the page and is not processed dynamically. In such a case, JS optimization may take longer, but this is not the rule.

It is worth emphasizing that a well-implemented JS framework can be Google-friendly. Then it is enough to check (and possibly optimize) certain elements. Because of that, it is difficult to say how long optimization will take without full knowledge of the website. In most cases, our JS SEO activities are fully completed within 1-2 months of cooperation.

JavaScript SEO: Unlock Your Modern Website’s Full Potential

Over 30% of development teams don’t feel comfortable diagnosing JavaScript-related SEO issues. The result? Thousands of modern websites—technologically excellent, fast, and interactive—remain practically invisible on Google.

Your React application might have the best UX on the market, but if search engines can’t index it, potential customers will never find it. At NON.agency, we solve this paradox by combining advanced technology with expert SEO knowledge.

Why Google Struggles with Your JavaScript Website

While your site shines with advanced functionality and smooth user experience, Google must take additional steps to “see” it. The search engine first fetches the HTML code, then downloads JavaScript files, renders the page in its browser, and only then can index it. This process, called “two-stage indexing,” can take weeks and sometimes fails entirely.

Common issues we observe:

Empty pages in search results – Google sees only the HTML skeleton without content
Delayed indexing – new content appears in search results with a month’s delay
Crawl budget problems – Google abandons rendering when the process takes too long
Inaccessible dynamic content – products, articles, or services generated by JavaScript remain invisible

Server-Side Rendering: More Than a Technical Solution

SSR isn’t just a technical matter—it’s a strategic business decision that impacts your brand’s visibility, conversions, and competitiveness. Properly implemented Server-Side Rendering transforms your JavaScript application into an organic traffic acquisition machine that’s search engine-friendly.

Our SSR implementation approach begins with a detailed analysis of your specific framework, as each technology requires an individual approach. Next.js offers different rendering strategies within a single application, Nuxt.js has built-in SEO mechanisms, and Angular Universal requires advanced state transfer configuration.

We pay special attention to Core Web Vitals optimization, focusing on LCP (Largest Contentful Paint) and INP (Interaction to Next Paint) parameters, which often pose challenges in JavaScript applications. A key element is also the hydration strategy—the process of “bringing to life” static HTML through JavaScript must be smooth and cannot impact user experience or performance metrics.

Comprehensive JavaScript SEO Optimization

Implementing Server-Side Rendering is just the beginning. Our JavaScript SEO optimization covers a much broader range of activities that together create a comprehensive performance strategy.

We start with implementing code splitting and lazy loading, dividing code into smaller fragments loaded on demand. This approach shortens first render time and significantly improves Core Web Vitals. We simultaneously optimize the hydration process using selective hydration techniques, where critical components “come alive” first, while less important elements load in the background without slowing user interactions.

A key element of our strategy is prerendering critical paths—the most important pages, such as the homepage, product categories, or landing pages, are pre-generated statically for maximum speed. Everything is complemented by real-time rendering monitoring, through which we constantly track how Google handles your site’s rendering and react instantly to any issues.

Problems Other Agencies Miss

While most SEO agencies focus on basic indexing problems, we identify and solve more complex challenges of modern JavaScript applications.

We pay special attention to conditional rendering and personalization—modern applications often show different content based on location, preferences, or user status, but Google sees only the default version, losing access to key product or service information. Similarly problematic are popular e-commerce solutions with infinite scroll, which can prevent Google from accessing dynamically loaded products.

No less important are issues related to dynamic URLs and routing—Single Page Applications often generate URL addresses that don’t physically exist on the server, causing indexing problems. Additionally, structured data generated by JavaScript often contains errors that prevent rich results from displaying in Google, depriving your site of valuable search result real estate.

Advanced Diagnostic Tools

We use tools and methodologies that go far beyond standard SEO audits, which often don’t catch specific JavaScript application problems.

Our specialty is real-time rendering analysis, where we precisely simulate Google’s indexing process and identify problems invisible in standard tools. We also monitor JavaScript execution time, precisely measuring how long Google needs to fully render your page, allowing us to optimize critical paths for maximum performance.

To ensure the best possible results, we conduct A/B tests of different rendering strategies, comparing the effectiveness of SSR, SSG, and ISR for different page types on your website.

Everything is complemented by continuous performance monitoring, through which we track the impact of every code change on SEO parameters and immediately react to emerging problems before they affect your search visibility.

Different Frameworks, Different Strategies

React and Next.js – We use getServerSideProps for pages requiring fresh data, getStaticProps with ISR for cyclically updated content, and client-side rendering only where actually needed.
Vue and Nuxt.js – We configure Universal mode for full SSR, utilize the @nuxt/content module for content pages, and optimize Nuxt generate for static pages.
Angular Universal – We implement proper state transfer for smooth hydration, integrate Service Workers for offline functionality, and configure Angular Elements for micro-frontend architectures.
Svelte and SvelteKit – We leverage built-in SSR capabilities and optimize for minimal bundle size for the best Core Web Vitals.

Quality and Transparency Guarantee

Every JavaScript SEO implementation is a long-term investment, which is why we provide:

Monthly technical reports containing analysis of all performance parameters, indexing status, and recommendations for the next month
Real-time monitoring dashboard access where you track Core Web Vitals, rendering status, and indexing issues
Stability guarantee – we monitor implementation for a minimum of 6 months after deployment and fix any issues arising from our modifications free of charge
Technical documentation for your development team so future changes don’t negatively impact SEO

Why JavaScript SEO Can’t Wait

Every month of delay means thousands of lost organic search sessions. Google increasingly relies on sophisticated algorithms that will favor sites offering excellent user experience—both in terms of speed and content accessibility.

Don’t let your technologically advanced site remain invisible to potential customers. JavaScript SEO is an investment in your digital brand’s future.

Start optimizing your JavaScript site today. Every day of delay is a missed opportunity to outrank competitors in search results.

Masz dodatkowe pytania?

Zobacz nasze wyjaśnienia dotyczące najpopularniejszych zagadnień:

Why is SEO JavaScript important for my website?

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Many JavaScript frameworks (e.g. React, Vue.js, Angular) rely on client-side rendering, which can make it difficult for search engines to index your content correctly. SEO for JavaScript ensures that search engines can properly render, crawl and index your pages, leading to better visibility and higher rankings in search results.

How much does SEO optimization for JavaScript cost?

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The cost depends on the framework used, the scale of the problems and the need to implement SSR. Many frameworks have built-in solutions (e.g. Next.js, Nuxt.js), but custom implementations can vary in price. Contact us for a quote tailored to your project.

How long does it take to optimize JavaScript?

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The time required for optimization depends on the complexity of the site. A basic SEO audit for JavaScript and optimizations can take several weeks, while larger projects (especially those requiring SSR implementation) can take 1-2 months.

What are the biggest SEO challenges related to JavaScript?

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Some common SEO problems for JavaScript are: delayed rendering (Google may need more time to index), hidden content (if it’s not rendered correctly, Google won’t see it), infinite scrolling problems (content may not be accessible to bots), incorrect URL structure (dynamic URLs may cause duplicate content).

Testimonials

What Our Clients Say About Us?

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We Appreciate Their Approach

NON.agency is our main link provider. Our goal is to provide our clients with the highest quality, personalized niche links. We consult with NON.agency on our needs — although our SEO specialists mainly place the order, the NON.agency team is a great advisor here. They give us recommendations on packages and links we should order.

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Chris S.

Business Owner

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Creatively identify opportunities

After learning about NoN Agency's capabilities and commitment, we decided to work together. They got to know our company with surprising insight, so the content they create is definitely at an expert level. They don't limit themselves to performing established tasks, but creatively identify opportunities and generate ideas for the development of our site. They also offer great contact!

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Aleksandra Duło

Marketing Manager, EmailLabs

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I Am Very Satisfied With the Services

For most of the year, NON.agency managed two full-time writers who wrote new content and rewrote old articles. The link building team strategically built links from high-reputation sites. I really like the Progress Tracker dashboard, which allows me to see progress in real time. It's a great way to communicate with the whole team.

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Blake Mitchell

SEO Consultant

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Their services don't end with link building

They [...] immediately created a content and backlink plan that has proven to be very effective in achieving what we needed right from the start. If they don't know the answer to a question, they will come back to you after analysis and provide a thorough explanation or alternative solution.

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Miłosz Nowakowski

Director of Sales at Brandly360

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They delivered everything on time

We have several clients for whom we wanted to provide link building, so we needed a strict number of links per month from NoN Agency. Communication was quick and easy, and implementation was always on time and as agreed upon

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Benas Leonavicius

SEO Project Manager, Meros Media

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A Truly NON-Agency Experience!

I wholeheartedly recommend working with Radek and Rafał. The NON.agency name perfectly reflects their unique, out-of-the-box approach. Their vast experience in international SEO, which requires both broad theoretical and practical knowledge, is impressive. The direct contact, quick responses, and full commitment to every project make collaborating with them a great pleasure. A well-deserved 10/10!

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Olga Zarr

SEO Consultant

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Professional Global SEO Approach

NON.agency is a remarkable team of SEO experts who understand the challenges and needs of the international market. Their approach to international SEO is both professional and strategic, helping companies gain visibility across various markets simultaneously. With extensive knowledge of local trends and search algorithms, they deliver effective campaigns tailored to each region's specific requirements. I recommend NON.agency to anyone eager to expand their business globally and achieve real SEO results!

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Lukasz Zaborski

SEO/SEM expert

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Highly recommended

We worked with non.agency on a link building campaign for a new website in the area of personal development. We wanted one of the sites to rank high in search results in the United States. The team provided high-quality links from relevant websites and anchor texts. Their communication style is friendly but professional and always proactive [...]. The site we wanted to improve climbed to position #3 a few days after the campaign ended. Highly recommended.

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George Chasiotis

Founder of Minuttia

Case study

Global Successes of Our Clients

Zwiększamy ruch dla sprzedaży, zapytań i przewagi rynkowej, nie dla samego ruchu czy statystyk i tabelek w raportach

+100.84%

Improvement in campaign conversion rate.

E-commerce

Marketing

+8,681%

Growth in Organic Search Clicks Over 5 Months

E-commerce

E-commerce B2B

+226%

Increase in the number of unique users from 3,000 to over 11,000

E-commerce

B2B e-commerce

We will prepare solutions tailored to your company's needs, market realities, and niche.

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