How to detect touch-capable browsers

The easiest way to detect touch-capable browsers is to check for the presence of touch events. It is no 100% solution, but has by far the best cost-benefit ratio. (Know that this does not detect touch devices, but browsers.)

Javascript

Copyvar isTouchDevice = 'ontouchstart' in window

Coffeescript

CopyisTouchDevice = 'ontouchstart' of window

On the difference between the Javascript and the Coffeescript version, see Beware: Coffeescript "in" is not the Javascript "in".