JavaScript SEO: An In

In recent years, JavaScript has grown in popularity for its robust support of old and new web browsers. This increased usage is largely due to the rapid rise of mobile gaming as well as IoT projects that require a more flexible programming language than popular functional languages like Java or C++. However, while JS may be good at what it does – creating interactive websites with plenty of features – search engine optimization remains an important aspect not covered by default libraries in the language.

The “javascript seo best practices” is a guide that provides information on the most important aspects of SEO for JavaScript websites. The article goes into detail about how to set up your website, how to optimize content, and how to make sure you are following Google’s guidelines.

Getting Google to index JavaScript content is one of the more typical technical SEO difficulties that SEOs confront. 

JavaScript is becoming more widely used on the internet. Many websites have struggled to expand organically as a result of ignoring the value of JavaScript SEO.

Working on sites built using JavaScript frameworks (such as React, Angular, or Vue.js) will obviously present distinct issues than working on sites built with WordPress, Shopify, or other popular CMS systems.

To achieve search engine success, you must understand how to examine whether your site’s pages can be displayed and indexed, discover flaws, and make it search engine friendly.

We’ll teach you all you need to know about JavaScript SEO in this tutorial. We’ll look at the following in particular:

JavaScript, or JS, is a webpage programming (or scripting) language. 

In summary, JavaScript works in conjunction with HTML and CSS to provide interaction that would otherwise be impossible. Animated visuals and sliders, interactive forms, maps, web-based games, and other interactive elements are common on most websites.

However, it’s becoming more usual to build complete websites using JavaScript frameworks like React or Angular, which can power both mobile and online applications. The fact that these frameworks may be used to create both single-page and multi-page web applications has increased their popularity among developers. 

However, employing JavaScript, as well as other frameworks, poses a number of SEO issues. We’ll look at them in more detail later. 

Examine the Condition of Your Website

with the help of Webinomy Site Audit

ADS illustration

JavaScript SEO is a kind of technical SEO that includes making JavaScript simple to crawl and index for search engines.

SEO for JavaScript sites has its own set of problems and procedures to follow in order to increase your chances of ranking by allowing search engines to crawl your web pages.

When dealing with JavaScript webpages, though, it’s simple to make typical blunders. To guarantee that everything is done right, there will be a lot more back-and-forth with coders.

However, JavaScript is becoming more widespread, and learning how to properly optimize these sites is a crucial skill for SEOs to acquire.

Let’s be clear about one thing: Google is far better at Rendering JavaScript than it was a few years ago, when it might take weeks.

But before we go into detail about how to make sure your website’s JavaScript is SEO friendly and can be crawled and indexed, it’s important to understand how Google processes it. This is accomplished by a three-step procedure:

  1. Crawling
  2. Rendering
  3. Indexing

This procedure is shown in further detail below:

JavaScript-SEO-An-InGoogle Image Credit

Let’s take a closer look at this procedure and compare it to how Googlebot scans an HTML page.

It’s a fast and easy procedure that begins with downloading an HTML file, extracting links, and downloading CSS files before sending these resources to Caffeine, Google’s indexer. The page is then indexed by caffeine. 

The procedure begins with the HTML file being downloaded, just as it does with an HTML page. Then JavaScript generates the links, but they cannot be removed in the same way. As a result, Googlebot must first download the page’s CSS and JS files before indexing the content using Caffeine’s Web Rendering Service. The WRS can then index and extract linkages from the material.

And the fact is that this is a time-consuming process that takes more time and resources than creating an HTML page, and Google cannot index material until JavaScript is produced. 

Crawling an HTML site is quick and easy: Googlebot downloads the HTML, then extracts and crawls the links on the page. When it comes to JavaScript, however, this is not possible since it must be displayed before links can be retrieved. 

Let’s look at some strategies to make the JavaScript content on your website SEO friendly. 

To index your website, Google must be able to crawl and display its JavaScript. However, it’s fairly rare to run across roadblocks that impede this.

However, there are numerous measures you can do to ensure that your website’s JavaScript is SEO friendly and that your content is being displayed and indexed. 

And it all boils down to three factors:

  • Ensure that Google can crawl the content of your website
  • Ensure that Google can display the material on your page
  • Ensure that Google can index the content of your website

There are actions you can take to ensure that these things happen, as well as techniques to make JavaScript content more search engine friendly.

Let’s take a closer look at them. 

Despite the fact that Googlebot is built on Chrome’s most recent version, it does not operate like a browser. That implies that opening your site in this manner does not ensure that the content of your website will be presented.

To ensure that Google can display your websites, utilize the URL Inspection Tool in Google Search Console.

Look for the ‘TEST LIVE URL’ button at the top right of your screen after entering the URL of a website you wish to test.

test live url

After a few moments, a ‘live test’ tab will emerge, and if you click ‘see tested page,’ you’ll get a snapshot of the website as rendered by Google. The rendered code may also be seen in the HTML tab.


Check for any inconsistencies or missing material, since this might indicate that resources (including JavaScript) have been blocked or that problems or timeouts have occurred. View any mistakes under the’more info’ tab to assist you figure out what’s wrong.

The most typical cause for Google’s inability to display JavaScript sites is that certain resources are mistakenly blacklisted in your site’s robots.txt file.

To guarantee that no critical resources are stopped from being crawled, add the following code to this file:

User-Agent: Googlebot Allow: .js Allow: .css

But first, let’s be clear: Google does not index.js or.css files in its search results. A website is rendered using these resources. 

There’s no need to disable critical resources, and doing so will prevent your content from being produced and, as a result, indexed. 

After you’ve validated that your web page is displaying correctly, you’ll want to see whether it’s being indexed.

You may do so both via Google Search Console and directly on the search engine.

To check whether your web page is in the index, go to Google and use the site: command. Replace with the URL of the page you wish to test in the following example:

If the page is included in Google’s index, it will appear as a returned result:


If the URL isn’t shown, that signifies the page isn’t in the index.

But let’s pretend it is and see whether a piece of JavaScript-generated material has been indexed. 

Use the site: command once more, and add a fragment of material to the mix. Consider the following scenario: “snippet of JS content”

You’re checking to see whether this material has been indexed, and if it has, this text will appear in the snippet. 

You may also use Google Search Console’s URL Inspection Tool to see whether JavaScript content has been indexed.

Instead of verifying the live URL, inspect the HTML source code of the indexed page by clicking the ‘view crawled page’ button.


 Look for pieces of material that you know are created by JavaScript in the HTML code. 

Many factors might be at play if Google is unable to index your JavaScript content, including:

  • In the first case, the material cannot be displayed.
  • Due to links to it being created by JavaScript on a click, the URL cannot be found.
  • While Google indexes the material, the page times out.
  • The JS resources do not affect the page sufficiently to merit being downloaded, according to Google.

Below, we’ll look at some of the most prevalent difficulties and their remedies.

The way your site displays this code has a big influence on whether or not Google indexes your JavaScript content. You should also be aware of the distinctions between server-side, client-side, and dynamic rendering.

To overcome the hurdles of dealing with JavaScript, SEOs must learn to collaborate with developers. While Google continues to enhance the way it crawls, displays, and indexes JavaScript-generated material, you can avoid many of the most prevalent difficulties from occurring in the first place.

In fact, knowing how to display JavaScript in numerous ways is perhaps the most significant thing you can learn about JavaScript SEO.

So, what exactly are the various forms of rendering and what do they imply?

When JavaScript is rendered on the server and a rendered HTML page is provided to the client, this is known as server-side rendering (SSR) (the browser, Googlebot, etc.). The method for crawling and indexing the page is the same as it is for any HTML page, so no JavaScript-specific concerns should arise. 

Here’s how SSR works, according to Free Code Camp: “When you visit a website, your browser sends a request to the server that stores the website’s content. Your browser receives the fully produced HTML and shows it on the screen after the request has been processed.” The issue is that SSR might be difficult for developers to understand. Still, there are tools like Gatsby and Next.JS (for the React framework), Angular Universal (for the Angular framework), and Nuxt.js (for the Vue.js framework) that may assist.

Client-Side Rendering (CSR) is the polar opposite of Server-Side Rendering (SSR), in which JavaScript is rendered by the client (in this example, the browser or Googlebot) using the DOM. When Googlebot tries to crawl, render, and index material, the issues stated above might arise.

According to Free Code Camp once again, “When developers speak about client-side rendering, they’re talking about utilizing JavaScript to render information in the browser. Instead of obtaining all of the material from the HTML page, you’ll receive a stripped-down HTML document with a JavaScript file that will display the remainder of the site in the browser.”

It’s easy to understand why SEO difficulties arise once you understand how CSR works. 

Dynamic Rendering is a feasible alternative to server-side rendering for providing a site with JavaScript content created in the browser to users but a static version to Googlebot. 

This is something that Google’s John Mueller said during Google I/O 2018:


Consider it as delivering client-side rendered material to browser users and server-side rendered stuff to search engines. Bing also supports and recommends this, and it can be done using tools like, which bills itself as “rocket science for JavaScript SEO.” Other possibilities include Puppeteer and Rendertron. 

1636641349_177_JavaScript-SEO-An-InGoogle Image Credit

To answer a common topic among SEOs, dynamic rendering is not considered cloaking as long as the material delivered is same. Only if a completely separate piece of material was supplied would this be termed cloaking. The material that users and search engines view will be the same with dynamic rendering, although with a different degree of interaction. 

More information on how to set up dynamic rendering can be found here.

It’s fairly rare to run into SEO difficulties as a result of JavaScript, and we’ve listed a few of the more prevalent ones below, along with advice on how to prevent them.

  • Blocking.js files in your robots.txt file will prohibit Googlebot from crawling, rendering, and indexing these sites. Allow these files to be crawled in order to prevent problems.
  • Google doesn’t usually wait long for JavaScript content to render, and if it does, you can notice that your content isn’t indexed due to a timeout problem. 
  • Because search engines do not click buttons, setting up pagination where connections to pages beyond the first (let’s say on an eCommerce category) are only produced with a on click event (clicks) would result in these subsequent pages not being indexed. Always utilize static links to aid Googlebot in finding your site’s pages.
  • When using JavaScript to lazily load a website, be careful not to postpone the loading of material that needs to be indexed. This is often reserved for photos rather than words. 
  • rendered on the client’s end In the same manner that server-side produced content may return server errors, JavaScript can’t. For example, redirect errors to a website that produces a 404 status code. 
  • Rather of utilizing #, make sure that static URLs are produced for your site’s web pages. That means your URLs should look something like this ( rather than something like this ( or this ( Static URLs should be used. Otherwise, Google will not index these sites since hashes are often ignored. 

Finally, there’s no doubting that JavaScript might create crawling and indexing issues for your website’s content. Still, by understanding why this is the case and learning how to deal with information created in this manner, you can drastically lessen these concerns.

It takes time to thoroughly grasp JavaScript, but even when Google improves its indexing, you’ll need to brush up on your knowledge and experience in order to solve any issues that arise.

The following books on JavaScript SEO are also recommended:

Examine the Condition of Your Website

with the help of Webinomy Site Audit

ADS illustration

JavaScript SEO is an important topic that can help a website gain more traffic. There are many different types of JavaScript frameworks, but the best one for SEO is AngularJS. Reference: best javascript framework for seo.

Frequently Asked Questions

Is JavaScript good for SEO?

Can Googlebot read JavaScript?

A: All modern browsers can read JavaScript, however Googlebot cannot currently run the code.

Is JavaScript used in Google?

Related Tags

  • javascript seo tools
  • seo for client-side rendering
  • javascript seo audit
  • is javascript bad for seo
  • content king javascript seo

Leave a Comment

Your email address will not be published.