The Web NFC API is a low-level API allowing web applications to access and exchange the data with the Near-Field Communication devices, such as NFC tags.

Current support is limited to an experimental implementation in Chrome, available behind an "Experimental Web Platform Features" on Android. There was also Firefox OS experimental implementation that is moz-prefixed and doesn't follow the current state of the specification draft.

API glimpse, options)
Registers for a notification about the data read from the NFC adapter specified by options.
navigator.nfc.push(message, options)
Triggers sending the message (string, ArrayBuffer or NDEF record structure) to the NFC adapter specified by options.