I am updating my web application to make it works well in a mobile device. I already use JQuery UI for this web application. After using Bootstrap 3 for the layout, I feel that it is somewhat weak on components while it is strong on layout. I notice the JQuery Mobile is another option. Although I can use a combination of various frameworks to suit my needs, I need to keep the size of download file as slim as possible. What is a good UI framework for my purpose? Can anyone share his/her experience on this matter?