NDEFReader: readingerror event

{{SecureContext_Header}}{{SeeCompatTable}}{{APIRef("Web NFC API")}}

The readingerror event of the {{DOMxRef("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 {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.

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

onreadingerror = (event) => { }

Event type

A generic {{domxref("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

{{Specifications}}

Browser compatibility

{{Compat}}