Implementing Cannonical & Alternate tags on a large website

[Phily]

Hi There,

Our brochureware website consists of a Desktop site (www.oursite.com)and a Mobile website (m.oursite.com).

I know I need to implement the alternate tags on the desktop pages and the cannonical tags on the mobile versions. However we have a huge site is there any dynamic way through javascript to have the code be generated or is it something that should be done manually page by page?

Below is sample javascript a colleague completed to attempt to dynamically develop the snippet but I am unsure if bots will be able to interpret it:

Alternate version:

Thanks in advance

Phil

[Dr-Pete]

JavaScript is client-side code that's generally rendered in browsers, which means Google crawlers typically won't see it, and the almost definitely won't process it for these kinds of directives.

You can create these tags dynamically, but you need to do it with a server-side scripting language, like PHP, ASP, etc. That's a common practice, and many large sites dynamically code canonical tags, META ROBOTS, etc. (I've done it on many sites).