That's because nfcRaw is due to be added in version 1v92 of Espruino - it's in the repository but not in the 1v91 binary (and so not documented yet).
nfcRaw
You could try installing a cutting edge build like this one: http://www.espruino.com/binaries/travis/master/espruino_1v91.538_puckjs.zip
Although it may not work - the best best is to wait for the 1v92 release.
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
That's because
nfcRaw
is due to be added in version 1v92 of Espruino - it's in the repository but not in the 1v91 binary (and so not documented yet).You could try installing a cutting edge build like this one: http://www.espruino.com/binaries/travis/master/espruino_1v91.538_puckjs.zip
Although it may not work - the best best is to wait for the 1v92 release.