Posted by tombennetPractitioners of SEO have always been mistrustful of JavaScript.
This is partly based on experience; the ability of search engines to discover, crawl, and accurately index content which is heavily reliant on JavaScript has historically been poor. But it’s also habitual, born of a general wariness towards JavaScript in all its forms that isn’t based on understanding or experience. This manifests itself as dependence on traditional SEO techniques that have not been relevant for years, and a...
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SEO & Progressive Web Apps: Looking to the Future
moz.com/blog