Available in Chrome 89+ | View on GitHub | Browse Samples
Web NFC aims to provide sites the ability to read and write to NFC tags when they are brought in close proximity to the user’s device (usually 5-10 cm, 2-4 inches). The current scope is limited to NDEF, a lightweight binary message format. Low-level I/O operations (e.g. ISO-DEP, NFC-A/B, NFC-F) and Host-based Card Emulation (HCE) are not supported within the current scope.
scanButton.addEventListener("click", async () => {
log("User clicked scan button");
try {
const ndef = new NDEFReader();
await ndef.scan();
log("> Scan started");
ndef.addEventListener("readingerror", () => {
log("Argh! Cannot read data from the NFC tag. Try another one?");
});
ndef.addEventListener("reading", ({ message, serialNumber }) => {
log(`> Serial Number: ${serialNumber}`);
log(`> Records: (${message.records.length})`);
});
} catch (error) {
log("Argh! " + error);
}
});
writeButton.addEventListener("click", async () => {
log("User clicked write button");
try {
const ndef = new NDEFReader();
await ndef.write("Hello world!");
log("> Message written");
} catch (error) {
log("Argh! " + error);
}
});
makeReadOnlyButton.addEventListener("click", async () => {
log("User clicked make read-only button");
try {
const ndef = new NDEFReader();
await ndef.makeReadOnly();
log("> NFC tag has been made permanently read-only");
} catch (error) {
log("Argh! " + error);
}
});