nfcdom.onpeerready = function(event) {
var nfcPeer = nfcdom.getNFCPeer(event.detail); // 'event.detail' has sessionToken.
var req = nfcpeer.sendNDEF([ndefRecords]); // push NDEF message to other NFC device.
req.onsuccess = function(e) {
console.log("Successfully pushed P2P message");