NDEFReader.onreading

The onreading property of the NDEFReader interface is called whenever a new reading is available from compatible NFC devices, e.g. NFC tags supporting NDEF, when these devices are within the reader's magnetic induction field.

Examples

The following example shows how to process events using both the onreading and onreadingerror event handlerss.

const ndef = new NDEFReader();
  ndef.scan().then(() => {
    console.log("Scan started successfully.");
    ndef.onreadingerror = (event) => {
      console.log("Error! Cannot read data from the NFC tag. Try a different one?");
    };
    ndef.onreading = (event) => {
      console.log("NDEF message read.");
    };
  }).catch(error => {
    console.log(`Error! Scan failed to start: ${error}.`);
  });

Specifications

Browser compatibility

See also

• NDEFReader.onreadingerror, property representing handler for readingerror events.