The touch library is added to the TI-Nspire™ platform with platform.apiLevel = '2.2'. It is visible on all platforms but may ignore calls to its functions if the platform running the script does not support touch.
The touch library offers a low-level interface, which enables script authors to develop scripts that run on all platforms equally. It also places the effort on the script writer to design and test the script for all different platforms if platform compatibility is desired.
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