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FirefoxOS tag writing example, requires NFC capable device running FirefoxOS 2.1. App needs to be certified! Privileged APIs comming soon!
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| window.addEventListener('DOMContentLoaded', function() { | |
| 'use strict'; | |
| console.log('DOMContentLoaded, checking for NFC'); | |
| if (!navigator.mozNfc) { | |
| console.log('NFC not available'); | |
| return; | |
| } | |
| navigator.mozSetMessageHandler('activity', (activity) => { | |
| var data = activity.source.data; | |
| // prepare NDEF record to write using NfcUtils from shared/js/nfc_utils.js | |
| var nfcUtils = new NfcUtils(); | |
| var tnf = NDEF.TNF_WELL_KNOWN; | |
| var type = NDEF.RTD_URI; | |
| var url = nfcUtils.fromUTF8('\u0003mozilla.org'); | |
| var record = new MozNDEFRecord({tnf:tnf, type:type, payload:url}); | |
| // getting the tag | |
| var tag = navigator.mozNfc.getNFCTag(data.sessionToken); | |
| // writing array of NDEF records (NDEF message) to the tag | |
| var request = tag.writeNDEF([record]); | |
| request.onsuccess = () => { | |
| console.log('wrote data to tag'); | |
| }; | |
| request.onerror = () => { | |
| console.log('failed to write data to tag'); | |
| }; | |
| return true; | |
| }); | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Tag Write</title> | |
| <meta name="viewport" content="width=device-width"> | |
| <script type="text/javascript" src="shared/js/nfc_utils.js" defer></script> | |
| <script type="text/javascript" src="js/app.js" defer></script> | |
| </head> | |
| <body></body> | |
| </html> |
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| { | |
| "version": "0.1.0", | |
| "name": "Tag write", | |
| "description": "Quick example of writing contents on tag", | |
| "launch_path": "/index.html", | |
| "type": "certified", | |
| "permissions": { | |
| "nfc": { "access": "readwrite" } | |
| }, | |
| "activities": { | |
| "nfc-ndef-discovered": { | |
| "filters": { | |
| "type": "empty" | |
| } | |
| } | |
| }, | |
| "default_locale": "en" | |
| } |
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