I think this has been a hot topic lately: making web sites that adjust based on resolution of the device the user is using to browse. Now I’m not going to make this post about Sencha Touch. Even though in my “perfect responsive strategy” I would be using both ExtJS and Sencha Touch (and I can write more about that if you care to comment about your interest), this post is going to be only about ExtJS.
In this example we’ll be achieving the very common “navigation collapses to menu” effect, demonstrated here in my Android 4.x LG Intuition, by rotating the device from horizontal to vertical:
