On July 18, Google added a JavaScript SEO basics section to its Search developer’s guide. It includes general descriptions of how Google processes JavaScript as well as some best practices.

No search without Javascript: With GUI browsers, Google's search engine can only be used with Javascript enabled. Tested here on google.com with the Chromium-based browser Vivaldi.

Other search engines may choose to ignore JavaScript and won't see JavaScript-generated content. Revised: On some websites, JavaScript loads additional content when the page is open in a browser.

Google notes that less than 0.1% of searches (which still amounts to millions, given Google Search’s user base) are conducted by users who keep JavaScript disabled.

Search engines have made, and continue to make, significant improvements in indexing JavaScript websites. That said, the question of whether or not major search engines can properly render pages ...

JavaScript-powered websites are here to stay. As JavaScript in its many frameworks becomes an ever more popular resource for modern websites, SEOs must be able to guarantee their technical ...

Google still recommends you avoid using JavaScript for canonical tags but if you must, Google provided these recommendations.

Instead, you can embed an extremely simple JavaScript script in a bookmark, that, when clicked, pops up a search dialog and sends what you type in that dialog directly to the site’s search engine, ...

This guide explains exactly how you can test whether the JavaScript on your website renders properly. Plus: 7 tools for testing and debugging JavaScript.

Consequently, using JavaScript at the top of your documents may impact your relevancy. Some search engines may index your code first, then your HTML copy next. That means they may put the biggest ...