Beacon API - Web APIs | MDN

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Interfaces

This API defines a single method: navigator.sendBeacon().

The method takes two arguments, the URL and the data to send in the request. The data argument is optional and its type may be a string, an ArrayBuffer, a TypedArray, a DataView, a ReadableStream, a Blob, a FormData object, or a URLSearchParams object. If the browser successfully queues the request for delivery, the method returns true; otherwise, it returns false.

Specifications

Specification
Beacon
# sendbeacon-method

Browser compatibility

See also