Will dynamically generated content via Javascript hurt SEO

This is what I would like to do. I would like to load content dynamically.

Everything except the actual content will be rendered by javascript. I will place all the required information in a javascript variable or array at the bottom of the page. Then I will use javascript to place the content in the designated area.

These are the types of things I would like javascript to render:

• Login menu
• Header and logo info
• Side bar info
• Footer info
• Dialog开发者_StackOverflow社区 popups
• Ads

All of the MEAT content will not be rendered by javascript. I will use the backend server to put the content in html. My logic is that more of the real content will be in HTML and all the other things will be rendered by javascript. Will this help or hurt SEO?

Yes this will hurt SEO. You want to have all your links/menus/navigation to be accessible by the SEO bots otherwise your site will not be indexed properly. What exactly is it you're trying to accomplish here? I'm sure there are plenty of ways to accomplish what you're trying to do without hurting SEO.