http://fabricjs.com/ good! http://printio.ru/ringer_man_tees/new 自制T恤 http://stackoverflow.com/questions/5630251/javascript-library-to-manipulate-drag-resize-rotate-objects http://gridster.net/ http://interactjs.io/ http://skidding.github.io/dragdealer/ http://stackoverflow.com/questions/7996924/html5-framework-library-for-drag-and-drop-on-canvas https://github.com/kangax/fabric.js https://greensock.com/draggable