NDEFReader: onreadingerror

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The onreadingerror property of the NDEFReader interface is called whenever an error occurs during reading of NFC tags, e.g. when tags leave the reader's magnetic induction field.


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}.`);


# dom-ndefreader-onreadingerror

Browser compatibility

BCD tables only load in the browser