NDEFReader: readingerror event
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 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.
js
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.
js
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
Specification |
---|
Web NFC API # dom-ndefreader-onreadingerror |
Browser compatibility
BCD tables only load in the browser