Not sure how you could make it work with Sketch (Google was not very helpful here). If you need a design program that is geared toward web designers and also has support for flexible canvases with breakpoints… look at Macaw: http://macaw.co/
I can see how Sketch 3 can help with designing responsive sites. Shared text/layer styles and symbols could allow you to string multiple art boards together for different viewports more easily than Sketch 2.
Not sure how you could make it work with Sketch (Google was not very helpful here). If you need a design program that is geared toward web designers and also has support for flexible canvases with breakpoints… look at Macaw: http://macaw.co/
I can see how Sketch 3 can help with designing responsive sites. Shared text/layer styles and symbols could allow you to string multiple art boards together for different viewports more easily than Sketch 2.