SEO for single page apps: The nuts and bolts

SEO and Content Marketing Expert at SE Ranking, specializing in AI Overviews, link building, Looker Studio reporting, and other SEO-related topics.

Reviewed by Head of SEO at SE Ranking. Anastasia has extensive experience in website technical and on-page optimization, link building, and content marketing.

Dec 06, 2024.

Historically, web developers have been using HTML for content, CSS for styling, and JavaScript (JS) for interactivity elements. JS enables the addition of features like pop-up dialog boxes and expandable content on web pages. Nowadays, over 98% of all sites use JavaScript due to its ability to modify web content based on user actions.

A relatively new trend of incorporating JS into websites is the adoption of single-page applications. Unlike traditional websites that load all their resources (HTML, CSS, JS) by requesting each from the server each time it’s needed, SPAs only require an initial loading and do not continue to burden the server. Instead, the browser handles all the processing.

This leads to faster websites, which is good because studies show that online shoppers expect websites to load within three seconds. The longer the load takes, the fewer customers will stay on the site. Adopting the SPA approach can be a good solution to this problem, but it can also be a disaster for SEO if done incorrectly.

In this post, we’ll discuss how SPAs are made, examine the challenges they present for optimization, and provide guidance on how to do single-page application SEO properly. Get SPA SEO right and search engines will be able to understand your SPAs and rank them well.

Key takeaways

• Benefits of a single-page application: Faster browsing and seamless navigation, minimal layout shifts, and offline browsing capability due to cached resources.

• SEO challenges: Search engines may struggle to render JavaScript-heavy content or dynamically added elements. SPAs often use a single URL, making it harder for search engines to recognize individual views. Analytics tools may not capture all pageviews due to dynamic routing.

• Optimization solutions: Use server-side rendering to ensure crawlability. Use History API to avoid hash-based routing for distinct URLs that reflect actual content. Dynamically update meta tags for unique views and use JSON-LD for rich snippets.

• SEO best practices: Regularly audit your SPA websites with tools like SE Ranking to identify crawlability and indexing issues. Track user behavior on SPA websites with GA4.

• Essential SEO practices: Implement HTTPS to protect user data and maintain search engine prioritization. Develop keyword-rich, user-intent-focused content with optimized meta tags and organized visuals. Strengthen your backlink profile by focusing on quality over quantity to improve trust and rankings. Continuously analyze competitors’ strategies to identify opportunities and trends.

SPA in a nutshell

A single page application, or SPA, is a specific JavaScript-based technology for website development that doesn’t require further page loads after the first page view load. React, Angular, and Vue are the most popular JavaScript frameworks used for building SPA. They mostly differ in supported libraries and APIs but each serves fast client-side rendering.

SPAs greatly enhance site speed by eliminating requests between the server and browser. But search engines are not so thrilled about this JavaScript trick. The issue is that search engines don’t interact with sites like users do. This results in a lack of accessible content. If a single-page application is not managed correctly, search engines might fail to recognize dynamically loaded content, displaying only blank pages.

End users benefit from SPA technology because they can easily navigate through web pages without enduring extra page loads and layout shifts. Given that single page applications cache all the resources in local storages (after being loaded at the initial request), users can continue browsing them even with an unstable connection. The technology’s benefits for users keep it alive despite how demanding it can be SEO-wise.

Examples of SPAs

Many high-profile websites are built with single-page application architecture. Examples of popular ones include:

• Google Maps: Allows users to view maps and find directions without reloading the page.
• Airbnb: Dynamically updates as users search for accommodations without navigating to new pages.
• Facebook: Users interact with posts in a single page environment, without refresh.
• Trello: Enables project management with a seamless single-page experience.
• Spotify: Lets users browse and listen to music on a single interface.

Is a single-page application good for SEO?

Yes, if you implement it wisely.

The SPA approach is popular among web developers for its high-speed operation and rapid development. Developers can apply this technology to create different platform versions based on ready-made code. This speeds up the desktop and mobile application development process, making it more efficient.

While SPAs can offer numerous benefits, they also present challenges for SEO since search engines traditionally rely on HTML content to crawl and index websites, which can result in crawlability issues.

Why it’s hard to optimize SPAs

Before JS became dominant in web development, search engines only crawled and indexed text-based content from HTML. Google has made major strides to access content on SPAs that rely heavily on JavaScript.

While there’s debate about JavaScript’s impact on visibility, improper use can harm your ranking potential. Always follow best practices for SPA outlined below.

Crawling issues

Googlebot must parse, compile, and execute the JavaScript to see what’s hidden, resulting in delays. However, Google search handles JavaScript almost as effectively as normal web pages today. This is proven by a study by Vercel and MERJ.

URL and routing

SPAs simplify the user experience but complicate SEO. Unlike conventional sites with distinct URLs, SPAs usually maintain one URL using JavaScript for content updating. Managing relatable URLs is key to good SEO.

Tracking issues

Google Analytics tracking can be difficult due to dynamic content loading. Implementing GA4’s Enhanced measurement and configuring Google Tag Manager can help.

How to do SPA SEO

Start with a reliable tool for conducting full website audits.

Server-side rendering

SSR involves rendering a website on the server to allow crawlers to access content properly. Enhancing performance while maintaining SPA features is a challenge.

Progressive enhancement with feature detection

Feature detection enhances the user experience while allowing crawlers to interact with the simplest form of the page first.

Views as URLs to make them crawlable

Utilizing the History API allows users to navigate various sections of an SPA while also providing distinct URLs for search engines.

Testing an SPA for SEO

You can use tools like Google Search Console and Mobile-Friendly Tests to evaluate SEO performance.

URL inspection in Google Search Console

Provides crawling and indexing information, including rendered HTML and basic webpage evaluations.

Mobile-friendly test

Assesses key technical and usability factors for mobile accessibility.

There’s no way around basic SEO

Basic elements of SEO should be optimized such as:

• Security: Site must use HTTPS.
• Content Optimization: Ensuring unique meta tags for each view
• Link Building: Developing a solid backlink profile.
• Competitor Monitoring: Keeping an eye on competitors’ strategies.

Tracking single page applications

Track SPA with GA4

GA4 provides tools for user tracking in SPA environments. Set up Page changes based on browser history events in GA4.

Track SPA with SE Ranking’s Rank Tracker

SE Ranking provides keyword tracking and performance metrics tailored for SPAs, allowing competition analysis.

Single-page app websites done right

By ensuring proper optimization for SEO, SPAs can achieve high rankings while offering users seamless content interactions.