I have learnt some basics about developing iOS apps and curious to learn more. I recently came across the way websites are displayed on mobile and was willing to know as to are there are particular design patterns/methods supporting it. I tried opening walmart.com on mobile which gives same display of the website as on the screen, but if I open homedepot.com; the view I get on mobile is an optimized one.
How does this work? How do I get same/optimized display for different devices i.e. desktop screen, ipad or iphone??