NDEFReader: readingerror event

Secure contextLimited availability

The readingerror event of the NDEFReader interface is fired whenever an error occurs during reading of NFC tags, e.g., when tags leave the reader’s magnetic induction field.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("readingerror", (event) => { })

onreadingerror = (event) => { }

Event type

A generic Event.

Examples

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

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