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The connect() method of the MozNFCTag interface accepts a technology type to use for subsequent operations.

Note: connect() currently only supports NDEF-compatible tags.




nfctag = window.navigator.mozNfc.getNFCTag(sessionToken);

var connectreq = nfctag.connect("NDEF");
connectreq.onsuccess = function() {
  console.log('Connect success!');
connectreq.onerror = function() {
  console.log('ERROR: Failed to connect. Error: ' +;


NFCTechType: An enumerated String type, defined in the MozNFCTag.webidl:

enum NFCTechType {

Currently NDEF and NDEF_FORMATABLE are the only supported technology types.


A DOMRequest object.


The NFC implementation in Gecko follows the NFC Forum specifications.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support

No support

No support No support No support No support
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support No support No support 2.0 moz [1] No support No support No support

[1] Available in privileged apps as of Firefox OS 2.2; certified-only before that.

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, fscholz, teoli, lgarner
 Last updated by: chrisdavidmills,