index.md

title	short-title	slug	page-type	status	browser-compat
NDEFReadingEvent: NDEFReadingEvent() constructor	NDEFReadingEvent()	Web/API/NDEFReadingEvent/NDEFReadingEvent	web-api-constructor	experimental	api.NDEFReadingEvent.NDEFReadingEvent

{{securecontext_header}}{{APIRef()}}{{SeeCompatTable}}

The NDEFReadingEvent() constructor creates a new {{domxref("NDEFReadingEvent")}} object which represents events dispatched on new NFC readings obtained by {{DOMxRef("NDEFReader")}}.

Syntax

new NDEFReadingEvent(type, options)

Parameters

• type

  • : A string with the name of the event. It is case-sensitive and browsers always set it to reading.

• options

  • : An object that, in addition of the properties defined in {{domxref("Event/Event", "Event()")}}, can have the following properties:

    • serialNumber {{optional_inline}}

      • : The serial number of the device a message was read from. It default to "", and can be set to null.

    • message

      • : An object with the following members:

        • data {{optional_inline}}

          • : Contains the data to be transmitted. It can be a string object or literal, an {{jsxref("ArrayBuffer")}}, a {{jsxref("TypedArray")}}, a {{jsxref("DataView")}}, or an array of nested records.

        • encoding {{optional_inline}}

          • : A string specifying the record's encoding.

        • id {{optional_inline}}

          • : A developer-defined identifier for the record.

        • lang {{optional_inline}}

          • : A valid language tag according to {{RFC(5646, "Tags for Identifying Languages (also known as BCP 47)")}}.

        • mediaType {{optional_inline}}

          • : A valid MIME type.

        • recordType

          • : A string indicating the type of data stored in data. It must be one of the following values:

            • "absolute-url"

              An absolute URL to the data.

              "empty"

              • : An empty {{domxref("NDEFRecord")}}.

            • "mime"

              • : A valid MIME type.

            • "smart-poster"

              • : A smart poster as defined by the NDEF-SMARTPOSTER specification.

            • "text"

              • : Text as defined by the NDEF-TEXT specification.

            • "unknown"

              • : The record type is not known.

            • "URL"

              • : A URL as defined by the NDEF-URI specification.

Return value

A new {{domxref("NDEFReadingEvent")}} object.

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}