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JavaScript is a programming language used to make website pages more dynamic and interactive. Meanwhile, JavaScript SEO is a part of technical SEO that makes websites that have a lot of JavaScript codes easy to crawl and index. It also makes the websites as a search-friendly website. The goal of JavaScript is to make websites easier to find, and rank higher on search engines.

Why is JavaScript important for SEO?

Although JavaScript handles bots well, it is important to make sure that your scripts do not interfere crawler on search engines. When this happens, the page will not appear in the search results. Search engine bots process JavaScript web applications in three phases, namely crawling, indexing, and ranking.

1. Crawling

Crawling process is complicated. Normally, users use software called spiders or Googlebot. Bot starts crawling by selecting a web page and then following the links on that page. After that, it is crawling that page and following the links on that page, until all the links have been indexed.

2. Indexing

Indexing is analyzing URLs and understanding the content and its relevance. Indexing also tries to render the page and run JavaScript with Web Rendering Service  (WRS).

3. Ranking

Webmasters and SEO experts should try to offer quality content, optimize the website, generate and create valuable links following the quality guidelines from Google to increase the rank of the web page.

How does JavaScript Affect SEO?

JavaScript makes loading times for web pages and servers faster, easier to implement, dynamic and interactive interface. However, many JavaScript SEO users fail to optimize content using JavaScript code.

JS website is indexed and sorted. To help Google rank content that uses JavaScript requires tools and plugins to make it SEO-friendly.

How to Create SEO-Friendly JavaScript

JavaScript makes loading times for web pages and servers faster, easier to implement, dynamic and interactive interface. However, many JavaScript SEO users fail to optimize content using JavaScript code.

JS website is indexed and sorted. To help Google rank content that uses JavaScript requires tools and plugins to make it SEO-friendly.

1. Check If Google Can Render Website

Developers should always ensure that Google can technically create JavaScript content. Developers can use google's URL inspection tool. This will allow developers to see a screenshot of how exactly Googlebot will render the JavaScript content on the web page.

2. Check whether Content Has Been Indexed in Google

There are two ways to check if JavaScript content is literally indexed on Google, namely:

• Using Site Command for the fastest method
• Using Google Search Console for the most accurate method

How to Solve JavaScript Issues in SEO

Here are ways to solve some common issues that SEO and webmasters make in optimizing JavaScript-based website, namely:

1. Block JavaScript and CSS file for Googlebot

Since Googlebot can crawl and render JavaScript content, there is no reason to block it from accessing the internal or external resources that are required for rendering.

2. Do Pagination Correctly

Many popular websites use pagination as a way of breaking up a big amounts of content. However, it is very common that websites only allow Googlebot to visit the first page of the pagination.

As a result, Google cannot easily find a large number of valuable URLs.

JavaScript Framework

1. Angular Js

JavaScript Framework that has the most powerful performance, and is efficient also frequently used to develop Single Page Applications (SPA).

2. React Js

JavaScript Framework that is used to develop and operate dynamic user interfaces of high-traffic web pages.

3. Vue Js

JavaScript Framework which has a dual integration mode function that allows the creation of cross-platform Single Page Applications.

4. Ember Js

JavaScript Framework that supports two-way data binding, and is able to handle complex user interfaces.

5. Meteor Js

JavaScript Framework that is frequently used for logical needs on web pages, such as back-end development, database management, business logic.

6. Mithril

JavaScript Framework that is specially used to develop client-side Single Page Application.

7. Node js

Server-side-based JavaScript Framework that can work on cross platform and open source.

8. Polymer

JavaScript Framework developed by Google which can create elements of website without going in to more complex level.

9. Aurelia

The latest JavaScript Framework that can be implemented in all interfaces, and also interpret client-side and server-side at the same time.

10. Backbone js

JavaScript Framework that uses API in its development.