- The content of a web page is HTML;
- CSS handles the interface;
- A high level of dynamism and interactivity is provided by JS.
You can easily modify page content, add animated visuals and sliders, interactive forms, maps, and games using JS. Currency rates are updated in real-time on Forex and CFD trading websites, for example; otherwise, visitors would have to manually update the page. It typically produces the following types of content:
- Internal Links
- Top Goods
- Main Contents
JS is a fast, dynamic, and versatile programming language that works with a wide range of web browsers. It’s the foundation of modern web development because it allows web pages to communicate with each other within the browser.
- Client and server versions can both be used. This makes the programming language simple to use, as are other server-side languages such as PHP.
- This is a platform-independent programming language. A variety of frameworks and libraries are available for developing desktop and mobile apps, for example.
Instead of static content, most brands create dynamic pages using JS. This greatly improves the user experience on the site. Although SEOs should be aware, JS can negatively impact their site’s performance if they do not take the necessary precautions —
- Indexability– When a crawler views your page but cannot process the content, the search engines will not index your content for relevant keywords.
With regular updates, the latest features are fully supported, and it will be a “quantum leap” over previous versions! In this way, website owners can easily get their sites and web content management systems to work in both browsers, saving time and money. The robots.txt file does not apply to these files.
Some people are prone to abusing JS, and not everyone is familiar with it; it requires additional training. A programming language of this nature is imperfect and may not be the best for work: unlike HTML and CSS, it cannot be processed progressively. Some methods harm website crawling and indexing, which leads to decreased crawler visibility. Occasionally, you may have to choose between performance and functionality. Another issue to consider is which of these alternatives is more important to you.
The Google bot first retrieves a URL from the crawling queue for a page and determines whether it can crawl it. When the page is not prohibited in the robots.txt file, the bot will follow the URL and interpret a response for other URLs in the href attribute of HTML links.
If a URL is marked as prohibited, the bot will not make an HTTP request to it, and will simply ignore it.
Rendering & Processing
Once rendered, the bots will add the new URLs to the crawl queue and move the new content (added by JS) for indexing.
Two types of rendering exist: server-side and client-side.
- Server-Side Rendering
By using this method, the pages are rendered on the server. The result is that every time the site is viewed, the page is rendered on the server and sent to the browser.
As a result, when a visitor or a bot visits the site, the material is delivered in HTML markup. Therefore, Google does not need to render the JS independently to access the content, which improves SEO.
- Client-side Rendering
A client-side rendering technique, such as client-side JS, allows developers to create sites that are completely generated in the browser. As a result, CSR allows each route to be dynamically built in the browser.
The CSR process is slow at first since it visits the server several times, but after the requests are completed, the JS framework speeds up the process.
The content (both HTML and fresh JS) gets indexed by Google at this point. As a result, the page will display in a search engine when a relevant query is entered.
JS errors that hinder SEO
- Totally abandoning HTML
The search engine bots were previously unable to access JS files. In order to prevent robots from accessing them, webmasters often save them in directories and disable robots.txt. The Google bots now crawl JS and CSS sites, so this step is no longer necessary.
To check if your JS files are accessible by bots, log in to Google Search Console and examine the URL. The problem can be resolved by opening the robots.txt file.
- Incorrect use of links
Links help Google’s spiders understand your content better. They also learn how the site’s many pages are interconnected. Engaging users with links is also important for JS SEO. Improper link placement might negatively affect the user experience of your site. Thus, it’s a good idea to set up your links correctly.
Link anchor text and HTML anchor tags, as well as the href attribute, should include the destination page’s URL. When linking out, avoid non-standard HTML elements and JS event handlers, since these elements can make it hard for consumers to follow links and negatively impact the UX, especially for people using assistive technology. The Google bot will also reject those links.
- The Placement of JS Files in the Folder
Calculate the value of JS content. If it’s worth making users wait for, place it above. In any case, they should be placed below the fold line and above the page margin.
- Wrong Lazy Loading/Infinite Scrolling Operation
Incorrectly implemented lazy loading and infinite scrolling can obstruct bots from crawling a page. Both of these methods are excellent for displaying listings on a page, but only when they are used correctly.
- Redirecting with JS
JS redirects are widely used by SEOs and developers because bots can process them as ordinary redirects. However, site speed and user experience are negatively affected by these redirects. Since JS is scanned in the second phase, it may take days or weeks for JS redirection to crawl. Therefore, JS redirection should be avoided whenever possible.
Let’s take a look at some SEO tactics that will make your content more visible.
- Name and describe your page with distinct snippets
A unique title and a helpful meta description in the head area allow readers to find the results that best fit their needs.
- Make use of the History API instead of fragments
When Googlebot looks for links on your site, it considers only URLs in the href property of HTML links (a> tags). Use the History API instead of hash-based routing strategies to establish routing across views of your web application.
- Make HTTP status codes informative
When Googlebot crawls a page, it checks the HTTP status codes to see if anything went wrong. The status code tells Googlebot whether or not a page should be crawled or indexed.
- Do not use soft 404 errors for single-page apps
In client-side rendered single-page apps, routing is commonly done as client-side routing. In this situation, it might be impossible or impractical to use meaningful HTTP status codes. When using client-side rendering and routing, avoid soft 404 errors by using one of these solutions:
- Accessible design
Using Semantic HTML to Build a Website – Break up your text with sections, headings, and paragraphs. Add images and videos to your content with HTML image and video tags.
- Take advantage of structured data
- Conduct a website audit in JS
A routine manual inspection of the individual elements is carried out by utilizing the Google Developer Tools and the Web Developer Extension for Chrome. Here is a list of audit items you can include:
Visual Inspection: In this way, you can see how users will perceive your website. Analyze features such as the site’s public content, hidden content, and third-party content. These elements are supposed to be crawlable.