Java Script is used to make web pages dynamic or interactive. You can place the script inline in HTML document of call from the server.
The relationship with scripts used in web design is a matter of study whence effective crawling in concerned. Some search engine may not be able to crawl the site well if there is hindrance caused by a script or coding discrepancy. Hence web designers should be well aware of this fact and develop site keeping the crawling factor in mind.
JAVA script a programming language is not read directly unlike PHP or HTML. Whence the search engine visits a page it lists all the Java scripts then the browser initiates Dom a tool used by Google to render the script. DOM is a tool used for inspection and analysis of web pages.
Hence the complicated nature of the script calls for a minimalist approach. For example do not use it for making onclick drop down list. Hence when a user clicks a button the script comes into action. It is better to use internal linking with relevant anchor texts.
Dynamic URLS are not seo friendly hence on should ask the web developer to use a clean URL instead.
Java Scripts can slow down page download speed if they are not rendered perfectly by search engines.
Always use Fetch as Google to test websites or f a web page. This is a good way to find out crawl issues using the Search Console.
https://support.google.com/webmasters/answer/6066468?hl=en
If there is a problem take help of the development team since most of the Seos are content based and have little idea about programming. Hence if there is any indication that Google can’t see your content properly, call your development team for help.
The search engines are constantly updating themselves and solving most of the problems as time goes past. Hence webmasters may face less technical hassles in future.
For greater details on Java Script & Seo
Article By Sergey Grybniak
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